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=2847184718;3823274526
Mods=ProximityInventory;ProximityInventoryDumpSomewhere
These lines include the mod it requires, as its Steam page declares it:
- Proximity Inventory B42.20+ | We are so back ·
ProximityInventory
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Proximity Inventory Dump Somewhere3823274526 | 35 | description footer |