diff --git a/examples/basics/README.md b/examples/basics/README.md
index 839455718e31f..5369073b906de 100644
--- a/examples/basics/README.md
+++ b/examples/basics/README.md
@@ -43,7 +43,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/basics/sandbox.config.json b/examples/basics/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/basics/sandbox.config.json
+++ b/examples/basics/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/blog/README.md b/examples/blog/README.md
index 11bc070eff70b..67d0cfc2ee8b4 100644
--- a/examples/blog/README.md
+++ b/examples/blog/README.md
@@ -53,7 +53,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/blog/sandbox.config.json b/examples/blog/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/blog/sandbox.config.json
+++ b/examples/blog/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/deno/README.md b/examples/deno/README.md
index 98f7ee020622e..af49ebcb7e30c 100644
--- a/examples/deno/README.md
+++ b/examples/deno/README.md
@@ -42,7 +42,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 |                           | (preview uses Deno CLI)                          |
diff --git a/examples/deno/sandbox.config.json b/examples/deno/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/deno/sandbox.config.json
+++ b/examples/deno/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-alpine/sandbox.config.json b/examples/framework-alpine/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-alpine/sandbox.config.json
+++ b/examples/framework-alpine/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-lit/sandbox.config.json b/examples/framework-lit/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-lit/sandbox.config.json
+++ b/examples/framework-lit/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-multiple/sandbox.config.json b/examples/framework-multiple/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-multiple/sandbox.config.json
+++ b/examples/framework-multiple/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-preact/sandbox.config.json b/examples/framework-preact/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-preact/sandbox.config.json
+++ b/examples/framework-preact/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-react/sandbox.config.json b/examples/framework-react/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-react/sandbox.config.json
+++ b/examples/framework-react/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-solid/sandbox.config.json b/examples/framework-solid/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-solid/sandbox.config.json
+++ b/examples/framework-solid/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-svelte/sandbox.config.json b/examples/framework-svelte/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-svelte/sandbox.config.json
+++ b/examples/framework-svelte/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/framework-vue/sandbox.config.json b/examples/framework-vue/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/framework-vue/sandbox.config.json
+++ b/examples/framework-vue/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/hackernews/README.md b/examples/hackernews/README.md
index 937ad23eadd89..042a7807b51f7 100644
--- a/examples/hackernews/README.md
+++ b/examples/hackernews/README.md
@@ -48,7 +48,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/hackernews/sandbox.config.json b/examples/hackernews/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/hackernews/sandbox.config.json
+++ b/examples/hackernews/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/minimal/README.md b/examples/minimal/README.md
index 3c261d31786b6..20bad66154ece 100644
--- a/examples/minimal/README.md
+++ b/examples/minimal/README.md
@@ -36,7 +36,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/minimal/sandbox.config.json b/examples/minimal/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/minimal/sandbox.config.json
+++ b/examples/minimal/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/non-html-pages/README.md b/examples/non-html-pages/README.md
index d1caeed413851..ecdee84b10dc3 100644
--- a/examples/non-html-pages/README.md
+++ b/examples/non-html-pages/README.md
@@ -41,7 +41,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/non-html-pages/sandbox.config.json b/examples/non-html-pages/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/non-html-pages/sandbox.config.json
+++ b/examples/non-html-pages/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/portfolio/README.md b/examples/portfolio/README.md
index 7ca90501af54f..3c8ee3aa47258 100644
--- a/examples/portfolio/README.md
+++ b/examples/portfolio/README.md
@@ -19,7 +19,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/portfolio/sandbox.config.json b/examples/portfolio/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/portfolio/sandbox.config.json
+++ b/examples/portfolio/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-markdoc/README.md b/examples/with-markdoc/README.md
index 4f44648daa983..1a1acc1a5f396 100644
--- a/examples/with-markdoc/README.md
+++ b/examples/with-markdoc/README.md
@@ -45,7 +45,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/with-markdoc/sandbox.config.json b/examples/with-markdoc/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-markdoc/sandbox.config.json
+++ b/examples/with-markdoc/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-markdown-plugins/sandbox.config.json b/examples/with-markdown-plugins/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-markdown-plugins/sandbox.config.json
+++ b/examples/with-markdown-plugins/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-markdown-shiki/sandbox.config.json b/examples/with-markdown-shiki/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-markdown-shiki/sandbox.config.json
+++ b/examples/with-markdown-shiki/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-mdx/sandbox.config.json b/examples/with-mdx/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-mdx/sandbox.config.json
+++ b/examples/with-mdx/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-nanostores/sandbox.config.json b/examples/with-nanostores/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-nanostores/sandbox.config.json
+++ b/examples/with-nanostores/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-tailwindcss/sandbox.config.json b/examples/with-tailwindcss/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-tailwindcss/sandbox.config.json
+++ b/examples/with-tailwindcss/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-vite-plugin-pwa/README.md b/examples/with-vite-plugin-pwa/README.md
index 9c29863db0256..555d3e7de7557 100644
--- a/examples/with-vite-plugin-pwa/README.md
+++ b/examples/with-vite-plugin-pwa/README.md
@@ -36,7 +36,7 @@ All commands are run from the root of the project, from a terminal:
 | Command                   | Action                                           |
 | :------------------------ | :----------------------------------------------- |
 | `npm install`             | Installs dependencies                            |
-| `npm run dev`             | Starts local dev server at `localhost:3000`      |
+| `npm run dev`             | Starts local dev server at `localhost:4321`      |
 | `npm run build`           | Build your production site to `./dist/`          |
 | `npm run preview`         | Preview your build locally, before deploying     |
 | `npm run astro ...`       | Run CLI commands like `astro add`, `astro check` |
diff --git a/examples/with-vite-plugin-pwa/sandbox.config.json b/examples/with-vite-plugin-pwa/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-vite-plugin-pwa/sandbox.config.json
+++ b/examples/with-vite-plugin-pwa/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/examples/with-vitest/sandbox.config.json b/examples/with-vitest/sandbox.config.json
index 9178af77d7de6..8e476b8cc75f5 100644
--- a/examples/with-vitest/sandbox.config.json
+++ b/examples/with-vitest/sandbox.config.json
@@ -4,7 +4,7 @@
   "view": "browser",
   "template": "node",
   "container": {
-    "port": 3000,
+    "port": 4321,
     "startScript": "start",
     "node": "14"
   }
diff --git a/packages/astro/src/@types/astro.ts b/packages/astro/src/@types/astro.ts
index ef2ce33b9ec9f..e90a5b09ebfb1 100644
--- a/packages/astro/src/@types/astro.ts
+++ b/packages/astro/src/@types/astro.ts
@@ -936,7 +936,7 @@ export interface AstroUserConfig {
 	 * @docs
 	 * @name server.port
 	 * @type {number}
-	 * @default `3000`
+	 * @default `4321`
 	 * @description
 	 * Set which port the server should listen on.
 	 *
diff --git a/packages/integrations/image/test/fixtures/background-color-image/astro.config.mjs b/packages/integrations/image/test/fixtures/background-color-image/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/background-color-image/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/background-color-image/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/basic-image/astro.config.mjs b/packages/integrations/image/test/fixtures/basic-image/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/basic-image/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/basic-image/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/basic-picture/astro.config.mjs b/packages/integrations/image/test/fixtures/basic-picture/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/basic-picture/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/basic-picture/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/get-image-remote/astro.config.mjs b/packages/integrations/image/test/fixtures/get-image-remote/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/get-image-remote/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/get-image-remote/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/no-alt-text-image/astro.config.mjs b/packages/integrations/image/test/fixtures/no-alt-text-image/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/no-alt-text-image/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/no-alt-text-image/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/no-alt-text-picture/astro.config.mjs b/packages/integrations/image/test/fixtures/no-alt-text-picture/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/no-alt-text-picture/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/no-alt-text-picture/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/rotation/astro.config.mjs b/packages/integrations/image/test/fixtures/rotation/astro.config.mjs
index f00c6ebae7b9b..f2b44a4a073e0 100644
--- a/packages/integrations/image/test/fixtures/rotation/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/rotation/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' })]
 });
diff --git a/packages/integrations/image/test/fixtures/squoosh-service/astro.config.mjs b/packages/integrations/image/test/fixtures/squoosh-service/astro.config.mjs
index 7dafac3b65a3d..fcbb8ec5ed11f 100644
--- a/packages/integrations/image/test/fixtures/squoosh-service/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/squoosh-service/astro.config.mjs
@@ -3,6 +3,6 @@ import image from '@astrojs/image';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent' })]
 });
diff --git a/packages/integrations/image/test/fixtures/with-mdx/astro.config.mjs b/packages/integrations/image/test/fixtures/with-mdx/astro.config.mjs
index 7989a6f57ca29..3aae5b3a28dd9 100644
--- a/packages/integrations/image/test/fixtures/with-mdx/astro.config.mjs
+++ b/packages/integrations/image/test/fixtures/with-mdx/astro.config.mjs
@@ -4,6 +4,6 @@ import mdx from '@astrojs/mdx';
 
 // https://astro.build/config
 export default defineConfig({
-	site: 'http://localhost:3000',
+	site: 'http://localhost:4321',
 	integrations: [image({ logLevel: 'silent', serviceEntryPoint: '@astrojs/image/sharp' }), mdx()]
 });
diff --git a/packages/integrations/node/README.md b/packages/integrations/node/README.md
index e97544956ad13..5d3642be6fcff 100644
--- a/packages/integrations/node/README.md
+++ b/packages/integrations/node/README.md
@@ -159,7 +159,7 @@ For standalone mode the server handles file servering in addition to the page an
 You can override the host and port the standalone server runs on by passing them as environment variables at runtime:
 
 ```shell
-HOST=0.0.0.0 PORT=3000 node ./dist/server/entry.mjs
+HOST=0.0.0.0 PORT=4321 node ./dist/server/entry.mjs
 ```
 
 #### HTTPS