Revert "Remove redundant port specification"

This reverts commit a755677.

Author: jayaddison

.github/workflows/main.yml

@@ -21,6 +21,8 @@ jobs:
         image: postgres:11
         env:
           POSTGRES_PASSWORD: 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: