I'm wanting to add the prototype 17 and the burst module image. Is there a way I can do this myself?

Upload the images to Steam workshop and get skin id for them to add in your config 

I need to put it in imagelibrary. It's for the ServerRewards plugin.

you can add the image in ServerRewards, upload your images to somthing like imgur then get the direct link and add it to your item in ServerRewards data folder `reward_data` "CustomIcon" and reload ServerRwards twice for it to show.  Added a example below 

    },
    "pistol.prototype17_0": {
      "shortname": "pistol.prototype17",
      "customIcon": https://i.imgur.com/T0YtNs4.png,
      "amount": 1,
      "skinId": 0,
      "isBp": false,
      "category": 1,
      "displayName": "Prototype 17",
      "cost": 5000,
      "cooldown": 0
     },

"pistol.prototype17_0": {
"shortname": "pistol.prototype17",
"customIcon": https://i.imgur.com/trFwegL.png,
"amount": 1,
"skinId": 0,
"isBp": false,
"category": 1,
"displayName": "Prototype 17",
"cost": 1000,
"cooldown": 0
},

Unloaded plugin Server Rewards v0.4.73 by k1lly0u

[Server Rewards] No reward data found! Creating a new data file

[Server Rewards] All UI elements have been successfully generated!

Calling 'OnServerInitialized' on 'ServerRewards v0.4.73' took 162ms

Loaded plugin Server Rewards v0.4.73 by k1lly0u

[Server Rewards] All UI elements have been successfully generated!

Image failed to download! Error: HTTP/1.1 404 Not Found - Image Name: pistol.prototype17_0 - Image URL: https://www.rustedit.io/images/imagelibrary/pistol.prototype17.png

Image failed to download! Error: HTTP/1.1 404 Not Found - Image Name: gingerbreadsuit_0 - Image URL: https://www.rustedit.io/images/imagelibrary/gingerbreadsuit.png

Image failed to download! Error: HTTP/1.1 404 Not Found - Image Name: weapon.mod.burstmodule_0 - Image URL: https://www.rustedit.io/images/imagelibrary/weapon.mod.burstmodule.png
This is the error I get whenever I reload the plugin.

sorry my bad you need "" around the link, so it would be like this 

},
"pistol.prototype17_0": {
  "shortname": "pistol.prototype17",
  "customIcon": "https://i.imgur.com/T0YtNs4.png",
  "amount": 1,
  "skinId": 0,
  "isBp": false,
  "category": 1,
  "displayName": "Prototype 17",
  "cost": 5000,
  "cooldown": 0
 },

It Worked!!! You are so awesome!!! Thank you very much for your help, I really do appreciate it!