Run the config file through ERB to pull secrets in from ENV

[JKHiggins]

No description provided.

[JKHiggins]

@jimmyngo I've rebased this on master and it's passing the build now.

[jimmyngo]

This is pretty straight forward, but what's the value of passing secrets through ENV versus putting it in the directly in the config?

[JKHiggins]

We don't encrypt our config file, so it would be insecure to commit them to the repo. We prefer using ENV for this, the secrets can still be put in the ENV directly if that's what you want to do, but this just enables you to be more secure with your secrets.

[jimmyngo]

There's a few new classes of errors that can occur when calling ERB.new with invalid syntax/usage. We should handle them all, or change the error handling to something more generic.