diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3d24f3d..1aab40f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,6 +9,11 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@master
+      - name: Create master.key
+        uses: "finnp/create-file-action@master"
+        env:
+          FILE_NAME: "config/master.key"
+          FILE_DATA: ${{ secrets.SECRET_KEY_BASE }}
       - name: Login to Heroku
         run: heroku container:login 
         env:
diff --git a/Dockerfile b/Dockerfile
index df1e7dd..0de0575 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,14 +23,24 @@ yarn
 COPY ./entrypoint.sh /usr/bin/entrypoint.sh
 RUN chmod +x /usr/bin/entrypoint.sh
 
+ENTRYPOINT ["entrypoint.sh"]
+
 RUN gem install bundler --version "$BUNDLE_VERSION"
 
-COPY . .
+COPY ./Gemfile .
+COPY ./Gemfile.lock .
 
 RUN bundle install --jobs 20 --retry 5
 
+COPY ./package.json .
+COPY ./yarn.lock .
+
 RUN yarn
 
-ENTRYPOINT ["entrypoint.sh"]
+COPY . .
 
-CMD ["rails", "s", "-b", "0.0.0.0"]
\ No newline at end of file
+RUN chmod 600 config/master.key
+
+RUN bundle exec rails assets:precompile 
+
+CMD ["bundle", "exec", "rails", "s", "-b", "0.0.0.0"]
\ No newline at end of file
diff --git a/config/environments/production.rb b/config/environments/production.rb
index f37db58..6a042a2 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -25,7 +25,7 @@ Rails.application.configure do
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  config.assets.js_compressor = Uglifier.new(harmony: true)
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.