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=3823214638
Mods=OfflineReading
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Offline Reading3823214638 | 12 | description footer |