build-docker.yml

name: Build and push Docker image

on:
  workflow_dispatch:
    inputs:
      image_name:
        description: "Name of the Docker image"
        required: true
        default: "my-image"
      image_tag:
        description: "Tag of the Docker image"
        required: true
        default: "v0.0.1"

jobs:
  build:
    name: Build Docker image
    runs-on: ubuntu-latest
    permissions:
      id-token: write
      contents: read
      attestations: write
      packages: write

    steps:
      - uses: actions/checkout@v4

      - name: Docker build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          context: .
          file: Dockerfile
          push: true
          tags: ${{ env.REGISTRY }}/${{ inputs.image_name }}:${{ inputs.image_tag }}

      - name: Generate artifact attestation
        uses: actions/attest-build-provenance@v1
        with:
          subject-name: ${{ env.REGISTRY }}/${{ inputs.image_name }}
          subject-digest: ${{ steps.docker_build.outputs.digest }}
          push-to-registry: true