I've wanted to try highlight for our company although I find it off putting that new companies market themselves as "Open Source!" "Self Hosted!" but really aren't that accessible or documented for independent use.
I get it. it's a business, and it really is open source (thanks for the permissive license), but it often feels more like an after-thought/marketing play, which is completely fine if you're upfront. or maybe I'm just spoiled.
We are not specifically focused on web app monitoring, but you should be able to monitor web app easily, esp. if you want to also monitor backend services and have frontend in JS
And, yeah - we have all the docs for self hosting - https://signoz.io/docs/install/
Docs for Angular apps - https://signoz.io/docs/tutorial/instrumenting-angular-fronte...