Set up Docker CI?

.github/release-drafter.yml

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+name-template: 'v$RESOLVED_VERSION'
+tag-template: 'v$RESOLVED_VERSION'
+categories:
+  - title: '🚀 Features'
+    labels:
+      - 'feature'
+      - 'enhancement'
+  - title: '🐛 Bug Fixes'
+    labels:
+      - 'fix'
+      - 'bugfix'
+      - 'bug'
+  - title: '🧰 Maintenance'
+    label: 'chore'
+  - title: '📦 Dependency updates'
+    labels:
+      - 'dependencies'
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+change-title-escapes: '\<*_&' # You can add # and @ to disable mentions, and add ` to disable code blocks.
+version-resolver:
+  major:
+    labels:
+      - 'major'
+  minor:
+    labels:
+      - 'minor'
+  patch:
+    labels:
+      - 'patch'
+  default: patch
+template: |
+  ## Changes
+
+  $CHANGES

.github/workflows/ci.yml

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+name: Continuous integration
+
+on:
+  push:
+    branches:
+      - main
+  pull_request: {}
+
+jobs:
+  # minitest:
+  #   name: minitest
+  #   runs-on: ubuntu-latest
+  #   env:
+  #     TEST_DATABASE_URL: postgres://postgres:postgres@localhost/${{ github.event.repository.name }}_test
+  #     RAILS_ENV: test
+  #   services:
+  #     postgres:
+  #       image: postgres:14.8
+  #       env:
+  #         POSTGRES_PASSWORD: postgres
+  #       options: >-
+  #         --health-cmd pg_isready
+  #         --health-interval 10s
+  #         --health-timeout 5s
+  #         --health-retries 5
+  #       ports:
+  #         - 5432:5432
+  #   steps:
+  #     - uses: actions/checkout@v3
+  #     - name: Install libvips42
+  #       run: sudo apt-get update && sudo apt-get install libvips42
+  #     - name: Set up Ruby
+  #       uses: ruby/setup-ruby@v1
+  #       with:
+  #         bundler-cache: true
+  #     - name: Database setup
+  #       run: bundle exec rails db:create db:migrate
+  #     - name: Run tests
+  #       run: TERM=xterm-color bundle exec rails test
+  #     - name: Publish Test Report
+  #       uses: mikepenz/action-junit-report@v3
+  #       if: always() # always run even if the previous step fails
+  #       with:
+  #         check_name: 'Minitest Report'
+  #         report_paths: 'test/reports/TEST-*.xml'
+  #     - name: Archive HTML test reports
+  #       uses: actions/upload-artifact@v3
+  #       if: always()
+  #       with:
+  #         name: test-reports
+  #         path: test/html_reports
+  docker-build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Log in to registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@master
+      - name: Read .ruby-version
+        id: ruby-version
+        run: echo "ruby-version=$(cat .ruby-version)" >> $GITHUB_OUTPUT
+      - name: Build (and push to registry, if on main)
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: ${{ github.event_name == 'push' && github.event.ref == 'refs/heads/main' }}
+          platforms: linux/amd64
+          target: production
+          tags: |
+            ghcr.io/${{ github.repository }}:${{ github.sha }}
+          build-args: |
+            RUBY_VERSION=${{ steps.ruby-version.outputs.ruby-version }}
+  update-release-draft:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.event.ref == 'refs/heads/main'
+    needs:
+      - docker-build
+      # - minitest
+    outputs:
+      name: ${{ steps.release-drafter.outputs.name }}
+      html_url: ${{ steps.release-drafter.outputs.html_url }}
+    steps:
+      - uses: release-drafter/release-drafter@v5
+        id: release-drafter
+        with:
+          config-name: release-drafter.yml
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

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+name: Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  docker-release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Log in to registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+      - name: Pull built image
+        run: docker pull ghcr.io/${{ github.repository }}:${{ github.sha }}
+      - name: Tag image with version Tag
+        run: docker tag ghcr.io/${{ github.repository }}:${{ github.sha }} ghcr.io/${{ github.repository }}:${{ github.event.release.name }}
+      - name: Tag image as latest
+        run: docker tag ghcr.io/${{ github.repository }}:${{ github.sha }} ghcr.io/${{ github.repository }}:latest
+      - name: Push to registry
+        run: docker push ghcr.io/${{ github.repository }}:latest && docker push ghcr.io/${{ github.repository }}:${{ github.event.release.name }}