Yes, sorry. What I mean is that I have tested many different combinations because I am no expert and do not know exactly what I should use from the nginx example and where.
I use Nginx Proxy Manager through its GUI. I have created a proxy host for my Liberaforms server and tried scheme http (tried https too) and set the forwarding port 5000. I created a Let's Encrypt certificate but then I do not know what to add in the Advance Tab, I have tried different things from the example but never made the Liberaforms website work.
Now Nginx Proxy Manager shows the Liberaforms server status as "Offline".
As Nginx Proxy Manager is just an Nginx, I coud just delete what I have done and I guess I could follow you if you guide through the CLI on what I should exactly use, where I should exactly enter it and how I should exactly enter it.