link

functions/.gitignore

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+node_modules/
+*.local

functions/index.js

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+// functions/index.js
+ 
+const functions = require('firebase-functions');
+ 
+exports.helloWorld = functions.https.onRequest((request, response) => {
+    response.send("Hello from Firebase!");
+});

functions/package.json

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+{
+  "name": "functions",
+  "description": "Cloud Functions for Firebase",
+  "scripts": {
+    "serve": "firebase emulators:start --only functions",
+    "shell": "firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log"
+  },
+  "engines": {
+    "node": "18"
+  },
+  "main": "index.js",
+  "dependencies": {
+    "firebase-admin": "^12.1.0",
+    "firebase-functions": "^5.0.0"
+  },
+  "devDependencies": {
+    "firebase-functions-test": "^3.1.0"
+  },
+  "private": true
+}