new docker

Dockerfile

@@ -1,20 +1,28 @@
 FROM ruby:2.7.8
 
-# Point to Debian archive repos instead of the dead ones
-
 RUN apt-get update -qq && \
     curl -sL https://deb.nodesource.com/setup_16.x | bash - && \
-    apt-get install -y build-essential libpq-dev nodejs && \
+    apt-get install -y build-essential libpq-dev nodejs curl gnupg && \
+    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
+    apt-get update -qq && apt-get install -y yarn && \
     useradd --user-group --create-home --shell /bin/false app
 
 ENV HOME=/home/app
+WORKDIR $HOME/wedding
 USER app
 
-COPY --chown=app:app Gemfile Gemfile.lock $HOME/wedding/
-WORKDIR $HOME/wedding
+# Copy only Gemfiles first for caching
+COPY --chown=app:app Gemfile Gemfile.lock ./
+RUN bundle install
+
+# Copy the rest of the app
+COPY --chown=app:app . ./
+
+# Run bundle again in case new gems are required (because of conditional Gemfile logic)
+RUN bundle install
+
+# Compile assets (SCSS -> CSS)
 RUN bundle exec rake assets:precompile
 
-
 CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"]
-
-COPY --chown=app:app . $HOME/wedding/