docker-dnsmasq/.github/workflows/build.yml

name: Build Docker Image
on:
  workflow_dispatch:
  push:
    branches: [master]

jobs:
  build:
    name: GitHub Container Registry
    runs-on: ubuntu-latest
    permissions:
      packages: write
    steps:
      - uses: actions/checkout@v4
      - name: Set outputs
        id: vars
        run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
      - name: Check outputs
        run: echo ${{ steps.vars.outputs.sha_short }}
      - name: Login to GitHub Container Registry
        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u ${{ github.repository_owner }} --password-stdin
      - name: Build image for GitHub Package Registry
        run: docker build . --file Dockerfile --tag ghcr.io/${{ github.repository }}:${{ steps.vars.outputs.sha_short }} --tag ghcr.io/${{ github.repository }}:latest
      - name: Push image to GitHub Package Registry
        run: |
          docker push ghcr.io/${{ github.repository }}:latest
          docker push ghcr.io/${{ github.repository }}:${{ steps.vars.outputs.sha_short }}