Update devcontainer.json

Added GitHub Copilot extension and default open file "codespace.md"

Author: Chau-Nguyen-Developer

.devcontainer/devcontainer.json

@@ -1,9 +1,29 @@
 {
   //Name this configuration
   "name": "Codespace for Skills!",
+  
   //Use the base codespace image
   "image": "mcr.microsoft.com/vscode/devcontainers/universal:latest",
 
   "remoteUser": "codespace",
-  "overrideCommand": false
+  "overrideCommand": false,
+
+  // Add the IDs of extensions you want installed when the container is created. 
+  "customizations": 
+  {
+    "vscode": 
+    {
+      "extensions": 
+      [
+        "GitHub.copilot"
+      ]
+    },
+    "codespaces": 
+    {
+      "openFiles": 
+      [
+        "codespace.md"
+      ]
+    }
+  }
 }