Traceability instructions do not mention golint

[wickedest]

The instructions for building the tracaebility agent miss a few things (I'm a complete golang noob). But the instructions say "Install golang", run a few commands (e.g. go mod tidy) and then shows a Makefile (I guess I'm assume it needs to be executed). However, some vital pieces are missing:

I needed to install golint, and configure it:

$ go get -u golang.org/x/lint/golint
$ export $PATH=$PATH:/usr/local/go/bin:$HOME/go/bin

The Makefile doesn't have a default target, so make does nothing (that command is missing from the instructions too), but it actually needs:

$ make build