fix

app/[domain]/[slug]/page.tsx

@@ -57,6 +57,12 @@ export async function generateStaticParams() {
         },
       },
     },
+    // feel free to remove this filter if you want to generate paths for all posts
+    where: {
+      site: {
+        subdomain: "demo",
+      },
+    },
   });
 
   const allPaths = allPosts

app/[domain]/page.tsx

@@ -13,6 +13,10 @@ export async function generateStaticParams() {
       subdomain: true,
       customDomain: true,
     },
+    // feel free to remove this filter if you want to generate paths for all sites
+    where: {
+      subdomain: "demo",
+    },
   });
 
   const allPaths = allSites

lib/actions.ts

@@ -85,7 +85,11 @@ export const updateSite = withSiteAuth(
               customDomain: value,
             },
           });
-          await addDomainToVercel(value);
+          await Promise.all([
+            addDomainToVercel(value),
+            // Optional: add www subdomain as well and redirect to apex domain
+            // addDomainToVercel(`www.${value}`),
+          ]);
 
           // empty value means the user wants to remove the custom domain
         } else if (value === "") {

middleware.ts

@@ -18,12 +18,10 @@ export default async function middleware(req: NextRequest) {
   const url = req.nextUrl;
 
   // Get hostname of request (e.g. demo.vercel.pub, demo.localhost:3000)
-  let hostname = req.headers
+  const hostname = req.headers
     .get("host")!
     .replace(".localhost:3000", `.${process.env.NEXT_PUBLIC_ROOT_DOMAIN}`);
 
-  hostname = hostname.replace("www.", ""); // remove www. from domain
-
   const searchParams = req.nextUrl.searchParams.toString();
   // Get the pathname of the request (e.g. /, /about, /blog/first-post)
   const path = `${url.pathname}${