OpenMapTiles Server supports health checks (the
/health URL), so you can easily run multiple instances behind a load-balancer and set it up to automatically monitor the availability or even autoscale more instances if required.
If needed, you can also configure a reverse proxy to run in front of the OpenMapTiles Server. Just make sure that
X-Forwarded-Proto headers pass through, so the server can put correct URLs into the metadata JSONs and XMLs.