Automatic redirection issue when portal self hosted with azure app service and azure waff!

# Automatic redirection issue when portal self hosted with azure app service and azure waff!

- Instead of hosting the static files using a blob storage we have hosted the static files using a app service. The app service is using nginx server. And a waff is configured with custom domain.

## The Problem

- When you a host a website using azure app service it gives a default url with which we can visit the website, lets say : `https://appname.azurewebsites.net`.
- We have set up a waff that points the app to a custom domain, lets say - `https://example.com`.
- When I visit the domain `https://example.com`, it takes me to the index.html with no problem. But when visiting any other pages like `signin, apis, products, etc` pages the domain before the path automatically changes to the app service url i.e. `https://appname.azurewebsites.net/signin` or `https://appname.azurewebsites.net/apis`.
- Which should be `https://example.com/signin` or `https://example.com/apis` respectively.
- And when I try to forcefully visit any other page with custom domain name the url automatically changes to app service url.

## Only css is changed

- We have made only CSS changes in the developer portal code. No typescript code was changed.
- Need help, any responses will be highly appreciated. Thanks!!

No repository file or test is identified. Start by reproducing the custom-domain setup with Azure App Service, Azure WAF, and nginx, then inspect the hosting and redirect configuration; done means routes such as /signin and /apis remain on the custom domain instead of redirecting to the app-service URL.

Written by the indexing model from the issue text.