name: Publish Docker image
on:
  workflow_dispatch:
  push:
    branches:
      - 'master'
    tags:
      - 'v*'

jobs:
  docker_push:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: seitenwerke/nginx-proxy

      - name: Login to DockerHub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Push debian image to Docker Hub
        uses: docker/build-push-action@v2
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}