Add note about public server

README.md

@@ -31,6 +31,14 @@ Alternatively, you can download a .zip or clone one of the two Git repositories:
  - [GitHub](https://github.com/luk3yx/minetest-prang)
  - [GitLab](https://gitlab.com/luk3yx/minetest-prang)
 
+## Public server
+
+If you don't want to download PRANG!, Edgy1 hosts a public server. Note that
+movement processing and rendering is done server-side so there may be lag
+and/or glitching if you are far away from the server (which is currently in
+Canada) or have a poor internet connection. See
+https://edgy1.net/minetest/prang for more information.
+
 ## License
 
 ### Code