Add wiki/setup guides to the Geyser config (#4186)

* Added links to Wiki and Setup guide to the config
* implement suggestions

core/src/main/resources/config.yml

@@ -5,6 +5,10 @@
 #
 # GitHub: https://github.com/GeyserMC/Geyser
 # Discord: https://discord.gg/geysermc
+# Wiki: https://wiki.geysermc.org/
+#
+# NOTICE: See https://wiki.geysermc.org/geyser/setup/ for the setup guide. Many video tutorials are outdated.
+# In most cases, especially with server hosting providers, further hosting-specific configuration is required.
 # --------------------------------
 
 bedrock: