diff --git a/Dockerfile b/Dockerfile
index 665cb8f2..604aa1b6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,14 @@
 FROM ruby:2.5
 
 # Install app dependencies.
-RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
+RUN apt-get update -qq && apt-get install -y build-essential libpq-dev curl
+
+ADD https://dl.yarnpkg.com/debian/pubkey.gpg /tmp/yarn-pubkey.gpg
+
+RUN apt-key add /tmp/yarn-pubkey.gpg && rm /tmp/yarn-pubkey.gpg && \
+echo 'deb http://dl.yarnpkg.com/debian/ stable main' > /etc/apt/sources.list.d/yarn.list &&  \
+curl -sL https://deb.nodesource.com/setup_10.x | bash - && \
+apt-get update && apt-get install -y nodejs yarn
 
 # Set an environment variable for the install location.
 ENV RAILS_ROOT /usr/src/app
@@ -23,9 +30,9 @@ RUN bundle install --without development test --deployment --clean
 # Adding project files.
 COPY . .
 
-# Precompile assets.
-RUN bundle exec rake assets:clean
-RUN bundle exec rake assets:precompile
+# Precompile assets
+RUN SECRET_KEY_BASE="$(bundle exec rake secret)" bundle exec rake assets:clean
+RUN SECRET_KEY_BASE="$(bundle exec rake secret)" bundle exec rake assets:precompile
 
 # Expose port 80.
 EXPOSE 80