name: Build and Push Docker Image

on:
  workflow_dispatch:
  push:
    branches:
      - master

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

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

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

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=sha,format=short
            type=ref,event=branch

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          file: ./frontend/Dockerfile
          push: true
          # Always push the normal tags; if this is a master push, 
          # prepend "latest" to the list.
          tags: ${{ github.ref == 'refs/heads/master' && format('{0},latest', steps.meta.outputs.tags) || steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}