Installation on Docker Ubuntu Failed

Hi, I have successfully installed Beak on MacOS system, but I am having difficulties to do it on Ubuntu 16.04

Platform: Docker image Ubuntu 16.04
Docker image: Swift official image. Swift version 4.1.3

I have created a gist file with the result of my swift run beak run install : Installation

Moreover, I have tried as well using linuxbrew (Homebrew for Debian/Linux) and the tap formulae seems to do not fit the requirements for the installation either.

What am I doing wrong? Some help is appreciated!
I am new using Swift and I think Beak can add a very interesting and simple feature !

Thank you