Update ci.yml

Author: ClemTheAlien

.github/workflows/ci.yml

@@ -157,6 +157,10 @@ jobs:
         with:
           name: build-artifacts
           path: .next/*
+          
+      - name: Start application server
+        run: npm start & # Use '&' to run in background
+        working-directory: .next 
 
       - name: Run Lighthouse CI
         uses: treosh/lighthouse-ci-action@v12