chore: Refactor Dockerfile for gem installation and precompilation

Author: teetangh

Dockerfile

@@ -8,10 +8,11 @@ FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim as base
 WORKDIR /rails
 
 # Set production environment
-ENV RAILS_ENV="production" \
-    BUNDLE_DEPLOYMENT="1" \
-    BUNDLE_PATH="/usr/local/bundle" \
-    BUNDLE_WITHOUT="development"
+ENV RAILS_ENV="development" \
+    RAILS_LOG_TO_STDOUT="true" \
+    RAILS_SERVE_STATIC_FILES="true" \
+    RAILS_MAX_THREADS="5" \
+    RAILS_MASTER_KEY=""
 
 # Throw-away build stage to reduce size of final image
 FROM base as build
@@ -22,14 +23,20 @@ RUN apt-get update -qq && \
 
 # Install application gems
 COPY Gemfile Gemfile.lock ./
-RUN bundle install
+RUN bundle install && \
+    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
+    bundle exec bootsnap precompile --gemfile
 
 # Copy application code
 COPY . .
 
 # Precompile bootsnap code for faster boot times
 RUN bundle exec bootsnap precompile app/ lib/
 
+# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
+RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
+
+
 # Final stage for app image
 FROM base
 
@@ -52,4 +59,4 @@ ENTRYPOINT ["/rails/bin/docker-entrypoint"]
 
 # Start the server by default, this can be overwritten at runtime
 EXPOSE 3000
-CMD ["./bin/rails", "server", "--trace"]
+CMD ["./bin/rails", "server"]

config/couchbase.yml

@@ -10,3 +10,7 @@ development:
 test:
   <<: *common
   bucket: travel-sample
+
+production:
+  <<: *common
+  bucket: travel-sample