docker-publish.yml

name: Docker

on:
  workflow_dispatch:
    inputs:
      tagInput:
        description: 'Tag'
        required: true
    
  release:
    types: [created]
    tags:
      - 'v*'

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      -
        name: Checkout
        uses: actions/checkout@v3
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v2
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Determine version tag
        id: version-tag
        run: |
          INPUT_VALUE="${{ github.event.inputs.tagInput }}"
          if [ -z "$INPUT_VALUE" ]; then
            INPUT_VALUE="${{ github.ref_name }}"
          fi
          echo "::set-output name=value::$INPUT_VALUE"
      -
        name: Build and push
        uses: docker/build-push-action@v3
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: |
            ghcr.io/basecamp/kamal:latest
            ghcr.io/basecamp/kamal:${{ steps.version-tag.outputs.value }}