release.yml

name: Build & Push Docker Image

on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag to build/push (e.g. v1.0.0)'
        required: true

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

jobs:
  docker:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout Code
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event_name == 'workflow_dispatch' && inputs.tag || github.ref }}

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

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

      - name: Lowercase image name (GHCR requires it)
        run: echo "IMAGE_NAME=${IMAGE_NAME,,}" >> "$GITHUB_ENV"

      - name: Determine tags
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest
            type=raw,value=${{ github.event_name == 'workflow_dispatch' && inputs.tag || github.ref_name }}

      - name: Build & Push Image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max