wildduck/.github/workflows/docker.yml

name: Build and publish a Docker image to Docker hub and ghcr.io
on:
    push:
        branches:
            - master
            - docker
        tags:
            - 'v*.*.*'

jobs:
    docker:
        runs-on: ubuntu-latest
        steps:
            - name: Checkout
              uses: actions/checkout@v2
            - name: Docker meta
              id: meta
              uses: docker/metadata-action@v3
              with:
                  # list of Docker images to use as base name for tags
                  images: |
                      nodemailer/wildduck
                      ghcr.io/nodemailer/wildduck
                  # generate Docker tags based on the following events/attributes
                  tags: |
                      type=semver,pattern={{version}}
                      type=semver,pattern={{major}}.{{minor}}
                      type=semver,pattern={{major}}
                      type=sha
            - name: Set up QEMU
              uses: docker/setup-qemu-action@v1
              with:
                platforms: 'arm64,arm'
            - name: Set up Docker Buildx
              uses: docker/setup-buildx-action@v1
            - name: Login to DockerHub
              if: github.event_name != 'pull_request'
              uses: docker/login-action@v1
              with:
                  username: ${{ secrets.DOCKERHUB_USERNAME }}
                  password: ${{ secrets.DOCKERHUB_TOKEN }}
            - name: Login to GHCR
              if: github.event_name != 'pull_request'
              uses: docker/login-action@v1
              with:
                  registry: ghcr.io
                  username: ${{ github.repository_owner }}
                  password: ${{ secrets.GITHUB_TOKEN }}
            - name: Build and push
              uses: docker/build-push-action@v2
              with:
                  context: .
                  platforms: linux/amd64,linux/arm/v8,linux/arm64
                  push: ${{ github.event_name != 'pull_request' }}
                  tags: ${{ steps.meta.outputs.tags }}
                  labels: ${{ steps.meta.outputs.labels }}