(add) GitHub Continuous Integration (CI) workflows ⚙️

.github/workflows/node.js.yml

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+# This file builds and runs the Node server for the client using pnpm.
+# Checks to ensure successful compile, lint, and run.
+#
+# The versioning is locked in the client folder. See @client/pnpm-lock.yaml file.
+#
+
+name: Node.js CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  lint-and-build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x, 22.x]
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+          run_install: false
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "pnpm"
+          cache-dependency-path: client/pnpm-lock.yaml
+
+      - name: Set Firebase Credentials
+        run: echo '${{ secrets.FIREBASE_SERVICE_ACCOUNT }}' > $GITHUB_WORKSPACE/firebase_service_account.json
+
+      - name: Install Dependencies
+        run: timeout 300s pnpm install --frozen-lockfile --reporter=silent
+        working-directory: client
+
+      - name: List Installed Node Modules
+        run: ls -la client/node_modules
+
+      - name: Run Lint
+        run: pnpm lint
+        working-directory: client
+
+      - name: Run Build
+        run: pnpm build
+        working-directory: client

.github/workflows/stale.yml

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+# This workflow warns and then closes issues and PRs that have had no activity for a specified amount of time.
+# 
+# Custom time set to 4:00 PM UTC (8:00 AM PST)
+#
+# You can adjust the behavior by modifying this file.
+# For more information, see:
+# https://github.com/actions/stale
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: '0 16 * * *'
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+    - uses: actions/stale@v5
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'Stale issue message'
+        stale-pr-message: 'Stale pull request message'
+        stale-issue-label: 'no-issue-activity'
+        stale-pr-label: 'no-pr-activity'