Increasing upload speed on a default docker installation


I’m using this setup with nextcloud 17.0.2 and postgres 11. It’s running on an Archlinux VPS with 16GB RAM and 6 cores.

The users are complaining about slow upload speeds. Using the web interface is slightly, but not significantly faster than the sync desktop client. Not sure if it’s a fair comparison, but my uploading to google drive is twice as fast. So I’d like to know if this default setup is already optimized or if I can do something more to optimize it? Is there a good guide somewhere for that?