Where to put configs in Golang?

Question

go

I am writing an application that uses the json config.
There are many folders (modules) in the application. Each module must name access to this config file.
As I understand it, after compilation, all paths will break if you work, for example, through
_, filename, _, _ := runtime.Caller(1)
How to be, where are the configs put in general, so that it would be good to test and run without problems?

Answer 1

$HOME/.appname

Answer 2

If you are normal, then you have exactly 2 levels.
Root and first nesting level.