Installation instructions are missing libz-dev, pkg-config

[ivanperez-keera]

Starting from a basic plain Ubuntu in a docker machine, the instructions we have in our repo are incomplete because some packages are missing.

Thanks to @MartinHalleTUHH for pointing it out.

[ivanperez-keera]

I'd love to add this to the next release, Copilot 4.3.

[ivanperez-keera]

I have now created an issue to track this: #591 .