feat: implement ci workflow

.github/workflows/ci.yml

@@ -0,0 +1,61 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: Test and Build
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 #v6.0.0
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run npm build
+        run: npm run build
+
+      - name: Run tests
+        run: npm test
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+      - name: Build Docker image
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        with:
+          context: .
+          push: false
+          tags: interview-webapp:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+  ci-status:
+    name: Validate CI Status
+    runs-on: ubuntu-latest
+    needs: test
+    if: always()
+    steps:
+      - name: Check all jobs succeeded
+        run: |
+          if [ "${{ needs.test.result }}" != "success" ]; then
+            echo "❌ Pipeline failed: One or more jobs did not complete successfully"
+            echo "Test job result: ${{ needs.test.result }}"
+            exit 1
+          else
+            echo "✅ All pipeline steps completed successfully!"
+          fi