Add initial code for Cloud Function

.eslintrc.js

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+module.exports = {
+  root: true,
+  env: {
+    es6: true,
+    node: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+  ],
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    project: ["tsconfig.json", "tsconfig.dev.json"],
+    sourceType: "module",
+  },
+  ignorePatterns: [
+    "/lib/**/*", // Ignore built files.
+  ],
+  plugins: [
+    "@typescript-eslint",
+    "import",
+  ],
+  rules: {
+    // Project-specific ESLint rules
+    'array-bracket-spacing': 'error',
+    'arrow-spacing': 'error',
+    'brace-style': ['error', '1tbs', { 'allowSingleLine': true }],
+    'comma-style': 'error',
+    'eqeqeq': 'error',
+    'indent': ['error', 2, { 'SwitchCase': 1 }],
+    'keyword-spacing': 'error',
+    'newline-per-chained-call': 'error',
+    'no-confusing-arrow': 'error',
+    'no-duplicate-imports': 'error',
+    'no-else-return': 'error',
+    'no-new-wrappers': 'error',
+    'no-param-reassign': 'error',
+    'no-useless-constructor': 'error',
+    'no-whitespace-before-property': 'error',
+    'nonblock-statement-body-position': 'error',
+    'object-curly-spacing': ['error', 'always'],
+    'operator-linebreak': 'error',
+    'prefer-arrow-callback': 'error',
+    'prefer-const': 'error',
+    'prefer-template': 'error',
+    'semi': 'error',
+    'space-before-blocks': 'error',
+    'space-before-function-paren': ['error', { 'named': 'never' }],
+    'space-in-parens': 'error',
+    'space-infix-ops': 'error',
+    'spaced-comment': 'error',
+    'template-curly-spacing': 'error',
+
+    // Project-specific ESLint rules for TypeScript
+    '@typescript-eslint/type-annotation-spacing': 'error',
+    '@typescript-eslint/prefer-for-of': 'error',
+    '@typescript-eslint/no-empty-interface': 'off',
+    '@typescript-eslint/explicit-module-boundary-types' : 'off',
+    '@typescript-eslint/no-floating-promises': ['error', { ignoreIIFE: true }],
+    '@typescript-eslint/no-unused-vars': ['off'],
+  },
+};

.firebaserc

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+{
+  "projects": {
+    "default": "kipr-321905"
+  }
+}

.github/workflows/cd.yml

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+name: Deploy to Google Cloud
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  deploy:
+    name: Deploy
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to produce an OIDC token, which is used for Workload Identity Federation with Google Cloud
+      id-token: write
+      contents: read
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+        with:
+          path: checkout-prefix
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+      - name: Install firebase-tools
+        run: npm install -g firebase-tools
+      - name: Authenticate to Google
+        uses: 'google-github-actions/auth@v2'
+        with:
+          workload_identity_provider: ${{ secrets.GCP_WORKLOAD_IDENTITY_PROVIDER_ID }}
+          project_id: ${{ secrets.GCP_PROJECT_ID }}
+          service_account: ${{ secrets.GCP_SERVICE_ACCOUNT_ADDRESS }}
+          create_credentials_file: true
+          export_environment_variables: true
+          cleanup_credentials: true
+      - name: Install dependencies
+        run: npm install
+        working-directory: checkout-prefix
+      - name: Build
+        run: npm run build
+        working-directory: checkout-prefix
+      - name: Deploy functions
+        id: deployFunctions
+        run: npm run deploy
+        working-directory: checkout-prefix
+      - name: Output firebase debug log on deployment failure
+        if: always() && (steps.deployFunctions.outcome == 'failure')
+        run: cat firebase-debug.log
+        working-directory: checkout-prefix

firebase.json

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+{
+  "functions": {
+    "predeploy": [
+      "npm --prefix \"$RESOURCE_DIR\" run lint",
+      "npm --prefix \"$RESOURCE_DIR\" run build"
+    ],
+    "source": "."
+  },
+  "emulators": {
+    "auth": {
+      "port": 9099
+    },
+    "firestore": {
+      "port": 8080
+    },
+    "ui": {
+      "enabled": true,
+      "port": 4001
+    },
+    "functions": {
+      "enabled": true,
+      "port": 5001
+    },
+    "singleProjectMode": true
+  }
+}