If you find the project structure a bit weird, pls check this out.
The most complete and well behaved part (read "covered by tests + nice display")
is the ticker command, but everything should work nonetheless.
make binary will build for your platform and place a ./bin symlink
in the project folder for you to play with. (./bin help)
But do run make and check out all the targets in the Makefile.
I used the existing 3rd party coinbasepro package because it provided some stuff that I didn't want to waste time doing myself.
Be sure to have the proper sandbox credentials in the required env vars when placing an order.