add comment to c import and add docker to readme

README.md

@@ -7,7 +7,7 @@
 ## Setup
 
 In order to run zmq please install [zmq](https://zeromq.org/download/) and [czmq](http://czmq.zeromq.org/page:get-the-software).
-On Arch, this is done by running `yay -S czmq`
+On Arch, this is done by running `yay -S czmq`. Or use the Docker image.
 
 ## Git Workflow
 

cmd/frednode/main.go

 package main
 
+// leave this in for cgo to work
+
 import "C"
 
 import (