Make configurable

Dockerfile

@@ -4,4 +4,6 @@ RUN apt-get update && apt-get -y install nodejs
 COPY . /app 
 WORKDIR /app
 RUN bundle install
+ENV ENV developpement
+ENV IP 0.0.0.0
 ENTRYPOINT /app/entrypoint.sh

entrypoint.sh

 #!/bin/bash
 ./bin/rails db:migrate
-./bin/rails server -b 0.0.0.0
+./bin/rails server -e $ENV -b $IP