ok, so you’re running Resin.io, docker, and a load of other things on that box, which means that you’re overloading it already.
I’d humbly suggest that getting rid of the lora server UI is not the solution to your problem, as even if it was possible all it’s serving is static Javascript to interact with the various API’s so it’s going to have minimal impact on that system.
I’d suggest either running this across multiple Pi’s, ditching Resin/Balena (even though it’s something that I love and have blogged about in the past!), or moving everything out of Docker containers and running them on the bare metal.
Failing that, either shell out for a Pi4 with 4G RAM, or look at a cloud provider such as DigitalOcean.com where you can get a more than adequate VM for under $10/month.
I’ve spent the last 20 years working as a Systems Administrator and Infrastructure Consultant, and you’re running too much on that Pi…