ci: add prostgress service

Author: wojtek-krysiak

.github/workflows/push.yml

@@ -30,6 +30,17 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     needs: setup
+    services:
+      postgres:
+        image: postgres:10.8
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: postgres
+        ports:
+        - 5432:5432
+        # needed because the postgres container does not provide a healthcheck
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -50,6 +61,11 @@ jobs:
       - name: Lint
         run: yarn lint
       - name: Test
+        env:
+          NODE_ENV: test
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DATABASE: postgres
+          POSTGRES_USER: postgres
         run: yarn test
 
   publish: