test: build examples in the CI (#3856)

Updated docker compose to be in line with current practices.

Reference: https://docs.docker.com/compose/

.github/workflows/ci.yml

@@ -24,3 +24,31 @@ jobs:
       - run: npm test
         env:
           CI: true
+
+  build-examples:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    strategy:
+      fail-fast: false
+      matrix:
+        example:
+          - custom-parsers
+          - typescript
+          - webpack-build
+          - webpack-build-server
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        
+      - name: Use Node.js 20
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+          
+      - name: Build ${{ matrix.example }}
+        run: |
+          cd examples/${{ matrix.example }}
+          npm install
+          npm run build

examples/cluster-nginx/docker-compose.yml

@@ -1,20 +1,13 @@
-
+services:
   nginx:
     image: nginx:alpine
     volumes:
       - ./nginx.conf:/etc/nginx/nginx.conf:ro
-  links:
-    - server-john
-    - server-paul
-    - server-george
-    - server-ringo
     ports:
     - "3000:80"
 
   server-john:
     build: ./server
-  links:
-    - redis
     expose:
     - "3000"
     environment:
@@ -22,8 +15,6 @@ server-john:
 
   server-paul:
     build: ./server
-  links:
-    - redis
     expose:
       - "3000"
     environment:
@@ -31,8 +22,6 @@ server-paul:
 
   server-george:
     build: ./server
-  links:
-    - redis
     expose:
       - "3000"
     environment:
@@ -40,8 +29,6 @@ server-george:
 
   server-ringo:
     build: ./server
-  links:
-    - redis
     expose:
       - "3000"
     environment:
@@ -49,8 +36,6 @@ server-ringo:
 
   client:
     build: ./client
-  links:
-    - nginx
 
   redis:
     image: redis:alpine