Total Beginner needs help with preparing rails app for heroku

[WarriorMonkIRE]

Hi,

Total newbie here using Ubuntu.
I'm using
http://installfest.railsbridge.org/installfest/deploy_a_rails_app
via the Odin Project to install what I need to get started with coding.
I am at the stage of deploying a first test rail app to heroku (Step.2.2).
The instructions tell me to: "Launch your text editor and open the "Gemfile" file located inside of your testapp folder. (On Windows, this should be in C:\Sites\railsbridge\test_app and on Linux/OS X, it should be under ~/railsbridge/test_app.)"_
So I launch Atom. I find the railsbridge testapp folder. I can see the "Gemfile" file but it is greyed out. (showing hidden files setting makes no difference). How do I ungrey the "Gemfile" file so that I can open it in Atom?
Please help. It's been a few days since I began installing everything for learning to code through the Odin Project and I am still not coding yet

Thank you, WarriorMonkIRE

[nuclearsandwich]

When you try to open the Gemfile in Atom, are you using the "Open File" or "Open Folder" option? Most of the time you'll want to use the "Open Folder" menu item to open the rails project folder. In your case it will be the test_app folder. Once you open the folder, part of the Atom window will display all the files in the folder, including the Gemfile and you can click on it to edit.

If you just want to edit the Gemfile without opening the project folder, you can use the "Open File" menu item to open the Gemfile directly.