feat(docker): add Dockerfile and Docker compose setup (#668)

• feat(docker): add Dockerfile and Docker compose setup

This change adds the posibilitiy to build a Docker Image out of Fossology.
It allows the execution as standalone container (combined database) or
connection against an external database instance as used by the Docker compose setup.

Signed-off-by: Roger Meier <r.meier@siemens.com>
Signed-off-by: Fabio Huser <fabio.huser@siemens.com>
Tested-by: Maximilian Huber <maximilian.huber@tngtech.com>
Tested-by: Pascal Bach <pascal.bach@siemens.com>