Open the Mod Manager tab on your server in the panel to search the Steam Workshop and add mods with one click; it writes the Workshop and Mod IDs into your server config for you. Restart to download them. Players get the mods automatically when they join.
Manual: edit Zomboid/Server/servertest.ini: WorkshopItems= (Workshop IDs, separated by ;) and Mods= (Mod IDs, separated by ;).
Sandbox settings (loot, zombie count, XP) are in Zomboid/Server/servertest_SandboxVars.lua. Stop the server before editing, start afterwards.
Resetting the world: stop the server and delete the Zomboid/Saves/Multiplayer/servertest/ folder. Back up first.
