Create test.yaml

.github/workflows/test.yaml

@@ -0,0 +1,30 @@
+name: Run Jest Tests (Backend)
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '22.7.0'
+
+      - name: Install dependencies (global)
+        run: npm install
+
+      - name: Install dependencies (backend)
+        working-directory: backend
+        run: npm install
+
+      - name: Run Jest tests
+        working-directory: backend
+        run: npm run test:ci