Implement simple routing app based on routingpy, pyvroom and valhala

[ejwillemse]

Simple routing app based on:

• https://github.com/gis-ops/routingpy
• ~https://openrouteservice.org/dev/#/api-docs~
• https://github.com/gis-ops/docker-valhalla
• https://github.com/VROOM-Project/pyvroom

[ejwillemse]

pyvroom seems to work pretty well, and it's very extendable, so way to go.