I have a 1.19.2 skyblock spigot server. The way i installed it is i simply copied this map into my server directory: https://skyblock.net/dl21/
The problem with this is, that it will still genrate terrain fairly close to spawn, so people can just easily cross over to the regular minecraft world.
Also, since the download did not contain a nether map, the nether is generated as normal (making it even easier to reach the mainland).
So how can I disable terrain generation in both the overworld and the nether?