I looked into doing the same thing earlier this week and have found recent support requests with replies from the signoz team that the "Base Path" concept is not supported by the front end. It must operate at the root of your DNS name. The common suggestion seems to be to add a sub-domain: signoz.acmecorp.com
SigNoz is an open-source APM. It helps developers monitor their applications & troubleshoot problems, an open-source alternative to DataDog, NewRelic, etc.
