Add my own mod to my server?

Hi, I recently created my own mod using MCreator. And i wanted my friends to try it with me for free so i chose aternos to host a server.

Unfortunatly I tried to add my mod to my server (I have forge installed) (my mod is in 1.17.1) But i dont know how. In Files > Mods i see a button to add a file or a folder. How does it work and is it possible to add it?

Well Unfortunatly it didn't helped me. What I understood is that i cant add my own mod. But also, I dont know what a FTP adress is. So, could you help my on that point?

Thanks for your reply.

Alright then Thanks anyway for the help i really apreciated it.