PRO TIP
When you see Red Box with stack trace, you can click any 
  stack frame to jump to the source file. The packager will launch your 
  editor of choice. It will first look at REACT_EDITOR environment 
  variable, then at EDITOR. To set it up, you can add something like 
  REACT_EDITOR=atom to your .bashrc.
.bashrc:
export GOROOT=/usr/local/go
export REACT_EDITOR=atom 
 
     
     
     
    