To make this easiert, you could have used gitolite 🙃 That was my first attempt in 2010 or something and it worked fine.

It’s just subjective, how easy or hard something is to configure :-) If traefic solves your problem and you can configure it easily: Win!

The comment derived from me, using a prusa with PEI sheet and their official advice is to wipe it down with isopropyl. But that is totally opinionated and only to be seen as one way to clean your buildplate surface. So, totally fine to use soap and warm water :-) Oh, and it’s more readily available in most cases. But could be a quick fix if fats are the cause for the adhesion problem.

Your statements on levelling and probes are also totally valid. For most people, starting with less sophisticated (cheaper) printers, this is a painful learning curve. But it pays off to understand the overall complexity of 3D printers and finetuning - and it’s fun to experiment.

Just a thought: Did you clean the bed with isopropyl? I had similar issues with bed adhesion on an Ender3 with the glass bed after a few prints, since I forgot to wipe it down.

On paper-levelling: Yes it’s kind of archaic, but it works. And an Ender3 is entry-level stuff where you have to integrate a BLTouch by yourself and compile marlin - that’s not something you want to do as a beginner.

In addition: NGINX is a webserver that can also work as a reverse proxy. That’s how It’m using it most of the time. HAProxy and NGINX will do the job nicely and don’t have too much overhead. Traefik on the other hand is an edge router and - IMHO - far more complex to configure. Especially for your usecase it’s oversized, since it also does loadbalancing and a lot of other stuff, your setup already does sufficiently well.