herda/.github/workflows/build.yml

# Build and publish to GitHub Container Registry
#
# https://docs.github.com/en/packages/managing-github-packages-using-github-actions-workflows/publishing-and-installing-a-package-with-github-actions#publishing-a-package-using-an-action

name: Build Docker image

on:
  workflow_dispatch:
  push:
    tags:
      - v*

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

jobs:
  build:
    name: Build and publish
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Log in to registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract image metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push image
        uses: docker/build-push-action@v5
        with:
          labels: ${{ steps.meta.outputs.labels }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}