I've made my own modpack with the latest version of forge universal for 1.12.2. My process for making it was to put the 1.12.2 universal forge.jar in the bin folder, renamed it modpack. Next, I copied all of my 1.12.2 mods and my config files from .minecraft into their respective folders. Lastly, I archived the bin, config, and mods folder with winrar into a .zip file, put it on dropbox, and made the link shareable having dl=1 at the end. Everything works fine when I use the minecraft launcher using the client version of forge.