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=3823200311
Mods=NewGasMaskTexture_B42
| Workshop item | Subscribers | Declared in |
|---|---|---|
| New Gas Mask Texture (B42)3823200311 | 10 | description footer |