Update CI/CD workflow to include Docker image push

.github/workflows/rubyonrails.yml

@@ -28,15 +28,12 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
-      # Add or replace dependency steps here
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@55283cc23133118229fd3f97f9336ee23a179fcf # v1.146.0
         with:
           bundler-cache: true
-      # Add or replace database setup steps here
       - name: Set up database schema
         run: bin/rails db:schema:load
-      # Add or replace test runners here
       - name: Run tests
         run: bin/rake
 
@@ -49,10 +46,34 @@ jobs:
         uses: ruby/setup-ruby@55283cc23133118229fd3f97f9336ee23a179fcf # v1.146.0
         with:
           bundler-cache: true
-      # Add or replace any other lints here
       - name: Security audit dependencies
         run: bin/bundler-audit --update
       - name: Security audit application code
         run: bin/brakeman -q -w2
       - name: Lint Ruby files
         run: bin/rubocop --parallel
+
+  docker:
+    needs: [test, lint]
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Login to Docker Hub
+      uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+      with:
+        images: ${{ secrets.DOCKER_HUB_NAMESPACE }}/${{ secrets.DOCKER_HUB_REPOSITORY }}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -2,14 +2,17 @@
 ARG RUBY_VERSION=3.2.2
 FROM ruby:$RUBY_VERSION
 
+RUN set -e
+
 # Rails app lives here
 WORKDIR /rails
 
 # Set production environment
 ENV RAILS_LOG_TO_STDOUT="1" \
     RAILS_SERVE_STATIC_FILES="true" \
     RAILS_ENV="production" \
-    BUNDLE_WITHOUT="development"
+    BUNDLE_WITHOUT="development" \
+    SECRET_KEY_BASE_DUMMY=1
 
 # Install application gems
 COPY Gemfile Gemfile.lock ./
@@ -21,8 +24,11 @@ COPY . .
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile --gemfile app/ lib/
 
+# # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
+# RUN bundle exec rails assets:precompile
+
 # Precompiling assets for production without requiring secret RAILS_MASTER_KEY
-RUN SECRET_KEY_BASE_DUMMY=1 bundle exec rails assets:precompile
+RUN SECRET_KEY_BASE=$(bin/rails secret) bundle exec rails assets:precompile
 
 # Entrypoint prepares the database.
 ENTRYPOINT ["/rails/bin/docker-entrypoint"]

README.md

@@ -1,4 +1,8 @@
-A starter Rails 7.1 application with Devise authentication with DaisyUI, Grafana and Prometheus metrics, and Docker configuration.
+A mini-starter Rails 7.0.5 web application
+
+- Devise authentication with DaisyUI forms
+- Grafana and Prometheus metrics (using the Yabeda framework)
+- Docker container
 
 ### How to run the application using Docker