Add integration test workflow

.github/workflows/integration-test.yml

@@ -0,0 +1,38 @@
+name: Integration Test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: postgres:13
+        env:
+          POSTGRES_USER: server
+          POSTGRES_PASSWORD: password-server
+          POSTGRES_DB: server_db
+        ports:
+          - 5432:5432
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+        working-directory: server
+
+      - name: Run tests
+        run: |
+          python -m unittest discover tests
+        working-directory: server