original v4.4 tag from https://github.com/synrc/n2o by @5HT
erl 20.0 - fix warnings
js for debug, additional fields for ftp
erl 23.3.4.5 - fix warnings
plain text error page rendering with new catch Class:Reason:Stacktrace syntax
cowboy 1.0.1 to 2.9.0
rename n2o to n4u (n2o for you)