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=3823577000
Mods=Area51_B42
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Area 51 B423823577000 | 16 | description footer |