Remove redundant port specification

Author: jayaddison

.github/workflows/main.yml

@@ -21,8 +21,6 @@ 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: