Add it to your server
In your server's .ini file (servertest.ini by default), add these to the existing WorkshopItems= and Mods= lines, separated by a semicolon (;).
WorkshopItems=3819886916
Mods=IsoTreeRoomFix
| Workshop item | Subscribers | Declared in |
|---|---|---|
| IsoTree Room Fix3819886916 | 21 | description footer |