Add tests for web app

.github/workflows/ci.yaml

@@ -46,6 +46,21 @@ jobs:
           cp ./packages/web/.env.example ./packages/web/.env
       - name: Install dependencies
         run: npm ci
+      - name: Install Playwright browser
+        run: npm exec --workspace=@eheikes/oscar-web -- playwright install --with-deps chromium
+      - name: Start API server for web tests
+        run: |
+          NODE_ENV=test PORT=3000 CORS_ALLOWED_ORIGIN=https://127.0.0.1:4173 RATE_LIMITING_MAX=100000 \
+            npm run start --workspace=@eheikes/oscar-api > /tmp/oscar-api.log 2>&1 &
+          # Any HTTP response (even a 401) means the server is up.
+          for i in {1..30}; do
+            if curl -sS -o /dev/null http://localhost:3000/items; then
+              echo "API is ready"
+              break
+            fi
+            sleep 1
+          done
+          curl -sS -o /dev/null http://localhost:3000/items || { cat /tmp/oscar-api.log; exit 1; }
       - name: Run linter
         run: npm run lint --if-present
       - name: Run build