docker-publish.yml

name: Publish Docker Image to GHCR

on:
  push:
    branches:
      - main
  workflow_dispatch:

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

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Log in to GHCR
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GHCR_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Build and tag Docker image
        run: |
          docker build -t ghcr.io/${{ github.repository }}:latest .

      - name: Install Slim Toolkit
        run: |
          wget https://github.com/slimtoolkit/slim/releases/download/1.40.11/dist_linux.tar.gz
          tar -xzf dist_linux.tar.gz
          sudo cp dist_linux/docker-slim /usr/local/bin/

      - name: Slim Docker image
        run: |
          docker-slim build --tag ghcr.io/${{ github.repository }}:slim ghcr.io/${{ github.repository }}:latest --http-probe=true --continue-after=30

      - name: Push Docker image to GHCR
        run: |
          docker push ghcr.io/${{ github.repository }}:latest
          docker push ghcr.io/${{ github.repository }}:slim