Remove 'VOLUME' from Dockerfile

Description

Remove 'VOLUME' entry from Dockerfile

Proposal

When creating an image, specifying volumes in the Dockerfile seems logical. However, this practice has no upside, and it creates lots of problems. Volumes should be handled in the docker-compose.yml or run-time options instead. For a more detailed explanation, please see the link below.

Links / references

https://boxboat.com/2017/01/23/volumes-and-dockerfiles-dont-mix/

Documentation blurb