If you want to change up the gameplay in Core Keeper or add some new content, you can use mods to do so. Mods will need to be installed on the server, as well as through the in game Mods menu for each player that wants to connect to the modded server. Here's how you can install them on your indifferent broccoli server.
1. Download each mod you want to install from mod.io. Make sure to select the correct version of the game.
2. Click the manual download button.
3. Open the File Manager
4. Navigate to /server-data/mods/
5. Right click and create a new folder, matching the name of the mod exactly.
6. Upload your mod zip file into the folder you created.
7. Extract the zip file.
8. Restart the server, and the mods will be loaded.