Add db preparation and webpack compilation when launching the container

Dockerfile

@@ -9,16 +9,15 @@ WORKDIR /app
 
 COPY Gemfile /app/Gemfile
 COPY Gemfile.lock /app/Gemfile.lock
-
 RUN bundle install
+
 RUN yarn install --check-files
+RUN yarn install
 
 COPY . /app
 
 # Add a script to be executed every time the container starts.
-COPY entrypoint.sh /usr/bin/
-RUN chmod +x /usr/bin/entrypoint.sh
-ENTRYPOINT ["entrypoint.sh"]
+ENTRYPOINT ["/app/docker-entrypoint.sh"]
 
 EXPOSE 3000