name: Docker Image CI for GHCR

on:  
  schedule:
    - cron: '0 */6 * * *'
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

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

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

    - name: Build and push Docker image
      uses: docker/build-push-action@v6
      with:
        context: .
        push: true
        tags: ghcr.io/${{ github.repository }}:latest
        cache-from: type=gha
        cache-to: type=gha,mode=max