First You Will Need A Server With A Mod Loader Server Type Like Fabric, Forge,etc.
How To Make Your Own Server On FMH
How To Add Modpacks To Your FMH Server With Modpack Manager (In-Built):
Step 1-
Go To FMH Dashboard
Step 2-
In The Left Side Bar Scroll Down And Go To Control And Click On Your Server

Step 3-
Go To More And Click On Modpacks

Step 4-
Click On Drop-Down Arrow And Select The Website You Want To Get The Modpack From

Step 5-
Search The Name Of The Modpack You Want\

Step 6-
Click On The Download Button Beside The Modpack You Want To Add

Step 7-
Click On The Drop Down In Pop Up To Select The Version Of The Modpack

Step 8-
Click Install Modpack And Enjoy
For Any Further Help Join The Discord And Open A Help Ticket In #help Channel.
How To Add Modpacks To Your FMH Server Without Modpack Manager:
Step 1-
Get A Modpack File (MAKE SURE IT IS A SERVER PACK)
Step 2-
Find A Website To Convert Your Modpack File To .zip (In My Example It Is From .mrpack to .zip site your file type may vary)
Step 3-
Drag The Modpack File On The Site

Step 4-
Wait For It To Download And You Will Get A .zip File

Step 5-
Upload Your .zip File To The Files Tab In FMH CONTROL PANEL

Step 6-
Now Click On The 3 Dots Beside The File And Click Unarchive

Step 7-
** ⚠️ READ CAREFULLY ⚠️ **
After You Unarchive The File You Will Get Shaderpacks,Resource Packs,Worlds And Mods Folder.
IF You Want To Have The Shaderpacks Resource Packs And World , You Havent Started Your Server Even Once Then Just Start The Server And Enjoy. IF You dont Want Them Delete Them.IF You Have Started Your Server Even Once There Will Already Be Resource Pack And World Folders If You Want Them Then Delete The Old World And Resource Pack Folder , Start The Server And Enjoy. IF You Dont Want Them Then Just Delete The Folder That Were Unarchived.
For Any Further Help Join The Discord And Open A Help Ticket In #help Channel.