Create a Homebrew launchd plist file

[chmaynard]

Platform: macOS

It would be useful to be able to use the brew services command to launch Litestream and replicate a specified database. The name and location of the database could be stored in an environment variable or file.

See: https://docs.brew.sh/Formula-Cookbook#launchd-plist-files

[benbjohnson]

That's a good idea. I'll get this added in the next release or two.