Ah, that's my fault.

I would actually suggest in our projects that we go the other way around, making `sample.env` a dotfile `.sample.env`. That would be consistent with Suspenders:

https://github.com/thoughtbot/suspenders/commit/1ebc5a77896c04926bcf1c8191f21887056fc496

The reason for doing that is you never actually need to look at the `.sample.env` file so hiding it as a dotfile is nice to keep it out of view during `ls`s and whatnot.