name: build on tag

on:
  push:
    branches: [ web ]
  pull_request:
    branches: [ web ]

jobs:
  docker:
    runs-on: ubuntu-latest
    name: Build
    steps:
    - name: Check out code into the Go module directory
      uses: actions/checkout@v2
    - name: Set output
      id: vars
      run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}
    - name: Set up QEMU
      uses: docker/setup-qemu-action@v1
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1
    - name: Login to Docker Hub
      uses: docker/login-action@v1
      with:
        username: ${{ secrets.DOCKER_HUB_USERNAME }}
        password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
    - name: Build and push
      id: docker_build
      uses: docker/build-push-action@v2
      with:
        push: true
        tags: ${{ secrets.DOCKER_HUB_USERNAME }}/go-
    - name: Image digest
      run: echo ${{ steps.docker_build.outputs.digest }}