Add functions default code w/ helloWorld

functions/.eslintrc.js

@@ -0,0 +1,32 @@
+module.exports = {
+    root: true,
+    env: {
+        es6: true,
+        node: true,
+    },
+    extends: [
+        "eslint:recommended",
+        "plugin:import/errors",
+        "plugin:import/warnings",
+        "plugin:import/typescript",
+        "google",
+        "plugin:@typescript-eslint/recommended",
+    ],
+    parser: "@typescript-eslint/parser",
+    parserOptions: {
+        project: ["tsconfig.json", "tsconfig.dev.json"],
+        sourceType: "module",
+    },
+    ignorePatterns: [
+        "/lib/**/*", // Ignore built files.
+    ],
+    plugins: [
+        "@typescript-eslint",
+        "import",
+    ],
+    rules: {
+        "quotes": ["error", "double"],
+        "import/no-unresolved": 0,
+        "indent": ["warn", 4]
+    },
+};

functions/.gitignore

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+# Compiled JavaScript files
+lib/**/*.js
+lib/**/*.js.map
+
+# TypeScript v1 declaration files
+typings/
+
+# Node.js dependency directory
+node_modules/

functions/package.json

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+{
+  "name": "functions",
+  "scripts": {
+    "lint": "eslint --ext .js,.ts .",
+    "build": "tsc",
+    "build:watch": "tsc --watch",
+    "serve": "npm run build && firebase emulators:start --only functions",
+    "shell": "npm run build && firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log"
+  },
+  "engines": {
+    "node": "16"
+  },
+  "main": "lib/index.js",
+  "dependencies": {
+    "firebase-admin": "^10.0.2",
+    "firebase-functions": "^3.18.0"
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^5.12.0",
+    "@typescript-eslint/parser": "^5.12.0",
+    "eslint": "^8.9.0",
+    "eslint-config-google": "^0.14.0",
+    "eslint-plugin-import": "^2.25.4",
+    "firebase-functions-test": "^0.2.0",
+    "typescript": "^4.5.4"
+  },
+  "private": true
+}

functions/src/index.ts

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+import * as functions from "firebase-functions";
+
+// // Start writing Firebase Functions
+// // https://firebase.google.com/docs/functions/typescript
+
+export const helloWorld = functions.https.onRequest((request, response) => {
+  functions.logger.info("Hello logs!", {structuredData: true});
+  response.send("Hello from Firebase!");
+});

functions/tsconfig.dev.json

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+{
+  "include": [
+    ".eslintrc.js"
+  ]
+}

functions/tsconfig.json

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+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "outDir": "lib",
+    "sourceMap": true,
+    "strict": true,
+    "target": "es2017"
+  },
+  "compileOnSave": true,
+  "include": [
+    "src"
+  ]
+}