Cant find shared.lua file in DarkRP Gamemode folder!

Hi.
Id like to add custom jobs to my DarkRP server, but I cant find the shared.lua file.
Is it under garrysmod/gamemodes/DarkRP/gamemode/config/jobrelated.lua ??
Please help me!

Download this: https://github.com/FPtje/DarkRPModification

It goes in the addons folder

then go in the lua/darkrp_customthings/jobs.lua

and put your custom jobs in there

Thank you, but 1 more question. Where do I add custom shipments?

lua/darkrp_customthings/shipments.lua

Thanks a lot!