feat: migrate mcp server to functions host

Author: sinedied

azure.yaml

@@ -12,12 +12,8 @@ services:
 
   burger-mcp:
     project: ./packages/burger-mcp
-    docker:
-      path: ./Dockerfile
-      # We build the Dockerfile from the root of the project as we're in an NPM workspace
-      context: ../..
     language: ts
-    host: containerapp
+    host: function
 
   burger-webapp:
     project: ./packages/burger-webapp

packages/burger-mcp/.dockerignore

@@ -0,0 +1,17 @@
+{
+  "bindings": [
+    {
+      "authLevel": "anonymous",
+      "type": "httpTrigger",
+      "direction": "in",
+      "name": "req",
+      "methods": ["get", "post", "put", "delete", "patch", "head", "options"],
+      "route": "{*route}"
+    },
+    {
+      "type": "http",
+      "direction": "out",
+      "name": "res"
+    }
+  ]
+}

packages/burger-mcp/Dockerfile

@@ -0,0 +1,17 @@
+{
+  "version": "2.0",
+  "extensions": {
+    "http": {
+      "routePrefix": ""
+    }
+  },
+  "customHandler": {
+    "description": {
+      "defaultExecutablePath": "node",
+      "workingDirectory": "",
+      "arguments": ["lib/server.js"]
+    },
+    "enableForwardingHttpRequest": true,
+    "enableHttpProxyingRequest": true
+  }
+}

packages/burger-mcp/function.json

@@ -0,0 +1,6 @@
+{
+  "IsEncrypted": false,
+  "Values": {
+    "FUNCTIONS_WORKER_RUNTIME": "custom"
+  }
+}

packages/burger-mcp/host.json

@@ -12,8 +12,8 @@
     "dev:local": "tsx watch src/local.ts",
     "build": "tsc",
     "clean": "rimraf lib",
-    "docker:build": "docker build -t burger-mcp -f ./Dockerfile ../..",
-    "docker:run": "docker run --rm -p 3000:3000 burger-mcp"
+    "update:local-settings": "node ./scripts/update-local-settings.mjs",
+    "postinstall": "npm run update:local-settings"
   },
   "keywords": [],
   "author": "Microsoft",

packages/burger-mcp/local.settings.json

@@ -0,0 +1,31 @@
+#!/usr/bin/env node
+/*
+ * Creates local.settings.json file for the Azure Functions.
+ * Uses .env file for loading environment variables.
+ * Usage: update-local-settings.mjs
+ */
+
+import path from 'node:path';
+import { writeFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+let settings = {
+  FUNCTIONS_WORKER_RUNTIME: 'custom',
+};
+const settingsFilePath = path.join(__dirname, '../local.settings.json');
+
+writeFileSync(
+  settingsFilePath,
+  JSON.stringify(
+    {
+      IsEncrypted: false,
+      Values: settings,
+    },
+    null,
+    2,
+  ),
+);
+console.log('local.settings.json file updated successfully.');