ci: set up GitHub Actions CI workflow and Vercel configuration

.github/workflows/test.yml

@@ -0,0 +1,75 @@
+name: CI
+
+on:
+  push:
+    branches: [main, master, development]
+  pull_request:
+    branches: [main, master, development]
+
+jobs:
+  test:
+    name: Lint, Format, and Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install Dependencies
+        run: |
+          npm install
+          npm install --prefix backend
+          npm install --prefix frontend
+
+      - name: Generate Prisma Client
+        run: npm run build
+
+      - name: Prettier Format Check
+        run: npm run format:check
+
+      - name: Run Monorepo Lint Checks
+        run: npm run lint
+
+      - name: Run Monorepo Test Suites
+        run: npm run test
+
+  lighthouse:
+    name: Lighthouse Accessibility Audit
+    runs-on: ubuntu-latest
+    needs: test
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install Frontend Dependencies
+        run: npm install --prefix frontend
+
+      - name: Build Frontend
+        run: npm run build --prefix frontend
+
+      - name: Install Lighthouse CI
+        run: npm install -g @lhci/cli@0.14.x
+
+      - name: Run Lighthouse CI
+        run: |
+          lhci autorun \
+            --collect.staticDistDir=frontend/dist \
+            --assert.preset=lighthouse:no-pwa \
+            --assert.assertions.accessibility=error \
+            --assert.assertions."categories:accessibility"="['error', {'minScore': 1}]" \
+            --upload.target=temporary-public-storage
+        env:
+          LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}

vercel.json

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+{
+  "version": 2,
+  "builds": [
+    {
+      "src": "frontend/package.json",
+      "use": "@vercel/static-build",
+      "config": {
+        "distDir": "dist"
+      }
+    }
+  ],
+  "routes": [
+    {
+      "handle": "filesystem"
+    },
+    {
+      "src": "/(.*)",
+      "dest": "/index.html"
+    }
+  ]
+}