GitHub Actions Docker build workflow

docker.yml

name: Docker

on:
  push: {}
  pull_request: {}
  
jobs:
    build:
        runs-on: ubuntu-latest
        steps:

            - name: Checkout repository
              uses: actions/checkout@v2

            - name: Build Image
              run: docker build . -t example
              
            - name: Run Unit Test
              run: docker run example sh -c "go test"