How to make os (e.g. ubuntu) interpret nimscript shebang

[noah]

if you end up using a shell to execute your nim tests (e.g. reusing a git 
workflow script) make sure to use bash so you can fail on pipe erorrs
    
    
    
    #!/usr/bin/env bash
    
    set -euo pipefail
    
    
    
    Run