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=3619862853;3830808968
Mods=ZombieBuddy;M1A2SEPv2Prototype
These lines include the mod it requires, as its Steam page declares it:
- ZombieBuddy ·
ZombieBuddy
| Workshop item | Subscribers | Declared in |
|---|---|---|
| M1A2 SEPv2 [B42.21]3830808968 | 19 | description footer |