Loosen up ruby version requirement?

[eliotsykes]

The ruby version specified in the Gemfile is 2.1.3. I've installed 2.1.3 to get started, however this may be a barrier to potential contributors. Suggestions:

• Remove the ruby version from Gemfile
• Use an env var:

ruby ENV['CUSTOM_RUBY_VERSION'] || '2.1.3'

• Leave as is

[justin808]

The reason it's specified in the Gemfile is for Heroku deployment. I'm open to options on this one. I'm wondering if this can default to the one in the .ruby-version file.

[eliotsykes]

The Gemfile could treat .ruby-version as an override by reading .ruby-version if it exists: https://gist.github.com/eliotsykes/8fecb12f96bb21fcb582

Leaving the ruby version out of the Gemfile would make this an easier tutorial to get working faster on developer environments for devs wanting to learn react+rails+webpack.

There's a balance between that and having it deployable to a production environment and how consistent does the ruby version need to be for a tutorial.

I'm not familiar enough with the project to understand what the priority is.