name: Build and Publish Docker Image

on:
  workflow_dispatch:

permissions:
  contents: read
  packages: write

jobs:
  build-and-push:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout main
        uses: actions/checkout@v6
        with:
          ref: main

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

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

      - name: Resolve short SHA
        id: vars
        run: echo "sha_short=$(git rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ghcr.io/${{ github.repository }}:latest
            ghcr.io/${{ github.repository }}:${{ steps.vars.outputs.sha_short }}