Provided you have docker installed.
docker pull openrouteservice/openrouteservice
docker run -p <desired host port>:8080 openrouteservice/openrouteservice
Test service by going to a browser and hit <host machine IP>:<desired host port>/ors/health
(e.g., http://localhost:8080/ors/health
).
As per official guide, you should get a status = ready
if all goes well.