Use VOLUME instead of add for the demo.

Dockerfile

@@ -14,7 +14,7 @@ RUN dnf -y install git
 # required by letsencrypt.  if it's not present, the SSL connection to the let's encrypt server will fail
 RUN dnf -y install openssl
 
-RUN mkdir -p /dtu-quiz/app
+#RUN mkdir -p /dtu-quiz/app
 WORKDIR /dtu-quiz/app
 
 RUN gem install foreman 
@@ -23,13 +23,14 @@ RUN pwd
 CMD ["sh","-c", "./run-server.sh"]
 
 # Install the necessary gems
-COPY Gemfile /dtu-quiz/app/Gemfile
-COPY Gemfile.lock /dtu-quiz/app/Gemfile.lock
-RUN bundle install
+#COPY Gemfile /dtu-quiz/app/Gemfile
+#COPY Gemfile.lock /dtu-quiz/app/Gemfile.lock
+#RUN pwd && ls -als 
+#RUN bundle install
 
 # Copy application code to container
-COPY . /dtu-quiz/app
-RUN rm -rf tmp
-RUN rm -rf log
-RUN mkdir tmp
-RUN mkdir log
+#COPY . /dtu-quiz/app
+#RUN rm -rf tmp
+#RUN rm -rf log
+#RUN mkdir tmp
+#RUN mkdir log

Gemfile.lock

@@ -333,6 +333,3 @@ DEPENDENCIES
   underscore-rails
   web-console (~> 2.0)
   websocket-rails (= 0.7.0)
-
-BUNDLED WITH
-   1.10.6

docker-compose.prod.yml

@@ -32,5 +32,7 @@ quiz:
     - "3000"
   links:
     - mongodb:db
+  volumes:
+    - .:/dtu-quiz/app
   environment:
     RAILS_ENV: 'production'