Ok, so my setup was working a while ago, but not anymore. Not sure what we've changed and don't really know where to start troubleshooting.
Basically, as mentionned in another post, we are getting 502 bad gateway.
When using systemctl, both nginx and metabase are starting fine (but obviously not working).
If I stop do systemctl stop metabase.service and start it manually with java -jar metabase.jar, it is working just fine.
I am assuming it has to do with Systemctl somehow, but don't know where look...
Any help will be very appreciated