Create Modpack

Folder Structure

Create a folder e.g. modpack and create subfolders called bin, config and mods.

Install Forge

Download the Forge Installer and Extract it into your modpack/bin folder. Rename the extracted jar-file to modpack.jar.

Note: This did not work for me (Forge would not load mods when starting the game). I solved it by installing a modpack using the same version of Minecraft from Technic Launcher and copying the modpack.jar from there.

Install Mods

Download all the desired mods and place them in modpack/mods.

Generate Config Files

In order to generate all the necessary config files, the mods need to be installed and run on a client. Use the same Forge Installer as before and use Install Client. Now start Minecraft Launcher and launch the newly created profile. Quit Minecraft as soon as it has finished starting up. Copy everything from .minecraft/config to modpack/config.

Tip: If your .minecraft folder is cluttered from previous mod installations you can start Minecraft Launcher with a custom directory: path/to/MinecraftLauncher.exe --workDir path/to/alternative/.minecraft

Create Archive

Archive all the contents of modpack into modpack.zip.

Host Modpack

The modpack needs to be publicly hosted and the zip-file must be directly accessible. One possibility is using Dropbox. Upload modpack.zip, create a share link and change the dl param to dl=1 to enable direct download.

Publish on Technic

Login and create a new modpack. Enter all the necessary information and most importantly the Dropbox url you created.

Create Server

In order to play your modpack on a server all the mods have to be installed on the server as well (unless stated otherwise).

Install Forge Server

To set up a Forge server create a modpack-server directory. Use the same Forge Installer as before and Install Server into your newly created folder.

Install Mods

Copy your mods into the modpack-server/mods folder.

Create Start Script

Create a new file start.bat and set its content to:

java -Xmx10G -Xms10G -jar server.jar nogui
pause

Make sure your Forge server jar is called server.jar.