Adding postgres example

.github/workflows/postgres-service.yml

@@ -0,0 +1,28 @@
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image:  node:10.16-jessie
+      
+    services:
+      postgres:
+        image: postgres:10.8
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: postgres
+        ports:
+        - 5432:5432
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+
+      redis:
+        image: redis
+        ports:
+        - 6379:6379
+
+    steps:
+    - uses: actions/checkout@mv1       
+    - run: node client.js
+      working-directory: ./postgres/