Add very basic integration tests

.github/workflows/tests.yml

@@ -15,17 +15,20 @@ jobs:
     steps:
     - name: Checkout code
       uses: actions/checkout@v3
-    
+
     - name: Install Node.js
       uses: actions/setup-node@v3
       with:
         node-version: 18
-    
+
     - name: Install packages
       run: npm install
-    
+
     - name: Run tests
       run: npm run test
-          
+
+    - name: Run integration tests
+      run: npm run test:integration
+
     - name: Run linting
       run: npm run lint