Webapp location is sensitive

[elestedt]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am using the latest version of esp32-wifi-manager (v3.3.1)
• I have searched open and closed issues to ensure it has not already been reported

Description

If I change the CONFIG_WEBAPP_LOCATION parameter to /wifi, style and js is still attempted to load from /.
If I change it to /wifi/ and visit http://10.10.0.1/wifi I get a 404, but if I go to http://10.10.0.1/wifi/ the UI works as expected.

Steps to Reproduce

simple example and change the WEBAPP_LOCATION as indicated above.

System Configuration

ESP32-S3-DevKitC-1

• Environment (Operating system, version and so on): Compiling on WSL2