Hi @Simon2018, I have helped on a similar subject : Onlyoffice on ubuntu 20 as lxd - #2 by Mageunic
Here is the hardware requirements of onlyoffice on linux : (ONLYOFFICE Docs for Linux system requirements - ONLYOFFICE)
Hardware requirements
ONLYOFFICE Docs changelog
- CPU
single core 2 GHz or better
- RAM
2 GB or more
- HDD
at least 40 GB of free space
- Additional requirements
at least 4 GB of swap