build-image.yml

name: build image

on:
  push:
    branches:
      - main

jobs:
  docker:
    runs-on: ubuntu-20.04
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      - name: Docker Meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: |
            ghcr.io/${{ github.repository }}
          tags: | # set latest tag for default branch, and semver
            type=raw,value=latest,enable={{is_default_branch}}
            type=semver,pattern={{version}}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            GIT_SHA=${{ github.sha }}
            COMMIT_MESSAGE="${{ github.event.head_commit.message }}"