Added postgres service

Author: Daniela Butano

.github/workflows/im-build.yml

@@ -8,6 +8,21 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    
+    services:
+      # Label used to access the service container
+      postgres:
+        image: postgres:11
+        env: 
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432/tcp
     env:
       TESTMODEL_URL: http://localhost:8080/intermine-demo
       TESTMODEL_PATH: intermine-demo