What you want is to go along with the business line of logitechs products and scrap the rest. There is an offline version of Logi Options+ “for air gapped machines” available. https://prosupport.logi.com/hc/en-hk/articles/10991109278871-Logitech-Options-Offline-Installer You may use it in a virtual machine aswell.

Install termux from f-droid. Then install nginx inside termux. Works great.