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# .github/workflows/docker.yml
name: Build and Push

on:
  push:
    branches: [main]
    tags:     ['v*']

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

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

- name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_TOKEN }}

- name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: myuser/myapp
          tags: |
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix=sha-

- name: Build and push
        uses: docker/build-push-action@v5
        with:
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          cache-from: type=registry,ref=myuser/myapp:buildcache
          cache-to:   type=registry,ref=myuser/myapp:buildcache,mode=max