Luanti 5.10 issues with mod data dir

Unfortunately I've tried looking in Luanti's source code to see where it
says this... (I'll have to grep a clone to maybe find it)

docker-compose.yml

@@ -6,6 +6,7 @@ services:
                 ports:
                         - "30000:30000/udp"
                 volumes:
+                        - ./data/mod_data:/mintest/mod_data
                         - ./data/minetest.conf:/minetest/minetest.conf
                         - ./data/worlds:/minetest/worlds
                         - ./data/games:/minetest/games