feat: add node for demo and playground (#320)

.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the
 // README at: https://github.com/devcontainers/templates/tree/main/src/docker-existing-dockerfile
 {
-    "name": "astra",
+    "name": "ten_agent_dev",
     "image": "ghcr.io/ten-framework/ten_agent_build:0.1.0",
     "customizations": {
         "vscode": {
@@ -15,12 +15,14 @@
     "workspaceFolder": "/app",
     // Use 'forwardPorts' to make a list of ports inside the container available locally.
     "forwardPorts": [
+        3000,
         8080,
         49483
     ],
     // Features to add to the dev container. More info: https://containers.dev/features.
     "features": {
         "ghcr.io/devcontainers/features/git:1": {},
-        "ghcr.io/devcontainers/features/python:1": {}
+        "ghcr.io/devcontainers/features/python:1": {},
+        "ghcr.io/devcontainers/features/node:1": {}
     }
 }