adding dev containers

Author: CawaMS

.devcontainer/devcontainer.json

@@ -0,0 +1,32 @@
+{
+    "name": "ai-chat-quickstart-csharp",
+    "image": "mcr.microsoft.com/devcontainers/dotnet:1-8.0",
+    "features": {
+        "ghcr.io/devcontainers/features/azure-cli:1": {
+            "installBicep": true,
+            "version": "latest"
+        },
+        "ghcr.io/azure/azure-dev/azd:latest": {
+            "version": "stable"
+        }
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-dotnettools.csdevkit",
+                "ms-dotnettools.vscode-dotnet-runtime",
+                "dbaeumer.vscode-eslint",
+                "esbenp.prettier-vscode",
+                "GitHub.vscode-github-actions",
+                "ms-azuretools.azure-dev",
+                "ms-azuretools.vscode-bicep",
+                "ms-azuretools.vscode-docker",
+                "ms-vscode.js-debug"            ]
+        }
+    },
+    "forwardPorts": [3000, 3100],
+    "remoteUser": "vscode",
+    "hostRequirements": {
+        "memory": "8gb"
+    }
+}