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=3827670438
Mods=NotebookExpanded
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Notebook Expanded[40.20]3827670438 | 19 | description footer |