# Builds the Dockerfile and pushes the result to GHCR on every merge to
# main, tagged :latest (what the server pulls) and :<sha> (rollback to
# any exact commit without a release process). The GITHUB_TOKEN is
# enough to push packages; no extra secret needed, only the
# packages: write permission below.
name: Image

on:
  push:
    branches: [main]

jobs:
  image:
    name: Build and push to ghcr.io
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4
      - uses: docker/setup-buildx-action@v3
      - uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ghcr.io/justinzeus/spreadlab:latest
            ghcr.io/justinzeus/spreadlab:${{ github.sha }}