docker-build.yml

name: Docker

on:
  push:
    branches:
      - main
      - develop
  release:
    types:
      - published

env:
  IMAGE_NAME: ds-wagtail
  
jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
    steps:
      - uses: actions/checkout@v3
      - uses: hadolint/hadolint-action@v3.1.0
        with:
          dockerfile: Dockerfile
      - name: Log in to registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin
      - name: Build and push image
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
          # Change all uppercase to lowercase
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # Strip "v" prefix from tag name
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # Use Docker `latest` tag convention
          [ "$VERSION" == "main" ] && VERSION=latest
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION
          docker build --tag $IMAGE_ID:$VERSION --platform=linux/amd64 .
          docker push $IMAGE_ID:$VERSION