codex.docs/.github/workflows/build.yml

name: Build and push Docker image

on:
  push:
    branches:
      - '*'
    tags:
      - 'v*'

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

jobs:
  build:
    runs-on: ubuntu-20.04

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

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

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=raw,value={{branch}}-{{sha}}-{{date 'X'}},enable=${{ startsWith(github.ref, 'refs/heads') }}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Build and push image
        uses: docker/build-push-action@v3
        with:
          context: .
          file: docker/Dockerfile.prod
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          push: ${{ startsWith(github.ref, 'refs/tags/v') || endsWith(github.ref, '/stage') }}