postgres:
    strategy:
      matrix:
        dbversion: ['postgres:latest', 'postgres:15', 'postgres:14', 'postgres:13']
        go: ['stable', 'oldstable']
        platform: [ubuntu-latest] # can not run in macOS and Windows
    runs-on: ${{ matrix.platform }}

    services:
      postgres:
        image: ${{ matrix.dbversion }}
        env:

* Add new links:
    * **English articles**:
        * [Real-time Notifications with Python and Postgres](https://wuilly.com/2019/10/real-time-notifications-with-python-and-postgres/) by [Guillermo Cruz](https://wuilly.com/).