Help to send mods to a Forge 1.12.2

Hello, I want to install mods with a forge 1.12.2, but I can’t find where to put my mods. I connected in sftp with filezila and I did not find any folder comparable to that of the forge servers or “mods” folder. Can you help me? I specify that I am using the version “mineos-node_stretch-x64.iso”. Thank you!