I would like to note you for a small mistake in your api.
When you run your api:
http://router.project-osrm.org/route/v1/driving/14.89857049,50.4026181;14.9366725,50.3229582?alternatives=false&annotations=nodes

All nodes are right from the same area in Czech Republic, but node nr.34819412 is from Norway!!!

I've treated it in my application, but it can be unpleasantly for others...