Docker file on github should build source

[JeremyMahieu]

Is your feature request related to a problem? Please describe.
You can't use docker to evaluate changes to the source code because it pulls the source from pypi and not from the actual local files.

Describe the solution you'd like
Dockerfile should be modified so it uses the .py files from the current directory or current github commit.

Describe alternatives you've considered
Alternative would be to write own dockerfile but this defeats the purpose of docker being a fast way to run something.

Additional context
All of this because panctl doesn't work in docker with the current dockerfile, or any other prebuilt image from dockerhub.