docker-image.yml

name: Docker Image Update

on:
  push:
    branches:
      - master
    paths:
      - Dockerfile
  pull_request:
    paths:
      - Dockerfile

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

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

      - name: Log in to the Container registry
        if: ${{ github.event_name == 'push' }}
        uses: docker/login-action@v1
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        if: ${{ github.event_name == 'push' }}
        uses: docker/build-push-action@v2
        with:
          file: Dockerfile
          push: true
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest

      - name: Build only
        if: ${{ github.event_name == 'pull_request' }}
        uses: docker/build-push-action@v2
        with:
          file: Dockerfile
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}