Sorry, my bad. I thought the app is nodejs web based.
When you start using hosting services, and your team is getting bigger, project grow, I always hit the config files problem.
You can also fix some of the "cons" of ENV vars by using a stub file with all the ENV vars, that can also be used as local DEV env. Some hostings also allows keeping ENV vars in files, but beats the purpose.
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All good advice, and the link about pros and cons about environment variables is very interesting.
But note that the context is a bit different: the 12 factor app is a software as a service, and my article is about a command-line tool.
Also, you're right, if you're using Javascript already, having config files in json (or even in javascript code!) is certainly a good idea.
Sorry, my bad. I thought the app is nodejs web based.
When you start using hosting services, and your team is getting bigger, project grow, I always hit the config files problem.
You can also fix some of the "cons" of ENV vars by using a stub file with all the ENV vars, that can also be used as local DEV env. Some hostings also allows keeping ENV vars in files, but beats the purpose.