Update continuous_integration.yml

    defaults:

      run:

        shell: bash -l {0}

    container-job:

    runs-on: ubuntu-latest

    container: postgis:12-3.1-alpine

    services:

      postgres:

        image: postgis

        env:

          POSTGRES_PASSWORD: NotTheDefault

        ports:

          - 3432:5432

    steps:

      - uses: actions/checkout@v2

        with: