docker-hub-push.yml

name: Build and Push Docker Image to Docker Hub

# We want to deploy on all merges to main and any version tags.
# On main push:
#   - Build, tag, and push image as `latest`
# On tag matching "v*.*.*":
#   - Build, tag, and push image as `latest`, `stable`, and `v*.*.*`
on:
  push:
    branches:
      - "main"
    tags:
      - "v*.*.*"

jobs:
  docker:
    runs-on: ubuntu-latest

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

      - name: Prepare
        id: prep
        run: |
          DOCKER_IMAGE=conorjf/diyndns
          TAGS="${DOCKER_IMAGE}:latest"

          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/v}
            TAGS="$TAGS,${DOCKER_IMAGE}:stable"

            if [[ $VERSION =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
              TAGS="$TAGS,${DOCKER_IMAGE}:$VERSION"
            fi
          fi

          echo ::set-output name=tags::${TAGS}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to DockerHub
        uses: docker/login-action@v1 
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          push: true
          tags: ${{ steps.prep.outputs.tags }}