I am trying to deploy a Rails application in the Phusion-Passenger Docker image:
https://github.com/phusion/passenger-docker
The Gemfile for the application specifies Ruby version 2.3.1, but the image comes with 2.2.5 by default, so bundle install fails.
I've read the documentation a couple of times, but it isn't clear to me if it is possible to user a different major/minor version of Ruby with this image.
I have tried the following in the Dockerfile
FROM phusion/passenger-full
ARG app_init=default
# Set correct environment variables.
ENV HOME /root
# Use baseimage-docker's init process.
CMD ["/sbin/my_init"]
RUN bash -lc 'rvm install ruby-2.3.1'
RUN bash -lc 'rvm --default use ruby-2.3.1'
Which does install and set Ruby 2.3.1 as the default, the "bundle install" step just times out when the Docker image is building.
When I open a shell to the container, and reset Ruby to 2.2.5, bundle install works.
Is it possible to use this image with Ruby 2.3.1 instead of Ruby 2.2.5?