Simple self-hosted OpenStreetMap routing using Valhalla and Docker
Briefly

I needed to be able to get lines showing the driving route from A to B for around 5,000 combinations of A and B.
Using Docker, it was nice and easy - and to make it even easier for you, here's a set of instructions.
If you start from the home page, you should be able to navigate to any region in the world.
Read at Rtwilson
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