docker-minecraft-server/.github/workflows/build-multiarch.yml

name: Build and publish multiarch
on:
  push:
    branches:
      - multiarch
    tags:
      - "[0-9]+.[0-9]+.[0-9]+-multiarch"

jobs:
  docker-buildx:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2.2.0
      - name: Get branch name
        uses: nelonoel/branch-name@v1
      - name:  Docker Buildx
        uses: ilteoood/docker_buildx@1.0.4
        with:
          publish: true
          imageName: itzg/minecraft-server
          tag: ${{ env.BRANCH_NAME }}
          dockerHubUser: ${{ secrets.DOCKER_USER }}
          dockerHubPassword: ${{ secrets.DOCKER_PASSWORD }}