Badges update automatically and link to the mod page on MineUniverse.
This is a simple mod that sets the global sound gamerule to false everytime the game/server loads, which then stops global sounds like the wither's spawning, ender dragon death, end portal activation to not be played for everyone.
Global sounds are unique sound events broadcast to all players in the world, regardless of distance.
Examples include:
Simply put this in the "mods" folder of you server or modpack. Server-side is fully supported.