I have been deploying/running production applications for about two years now
and the first problem that comes to mind while deploying OTP releases is
Build-time vs Run-time environment configuration. While running a Mix project
there isn’t much of a difference between build-time and run-time as you are
running the app in the same environment in which you’re compiling (building) it.
However, that might not be the case when using releases. At Annkissam, we have
come up with a few solutions to that problem which I explain better in
this
post.