Cache /repo/bin in make deploy-compile
In other words, pass --env GOPATH=/repo/bin into the golang container when compiling EMCO via deploy/deploy-compile.
This will reuse the local EMCO directory's bin/ and bin/pkg/, significantly speeding up the make process when Go packages have previously been downloaded.
This was previously implemented in make develop-compile but it also makes sense for deploy-compile... are there any objections?