Resolve endpoint /.well-known/assetlinks.json on domain mobile.element.io

[bro2020]

Steps to reproduce

1. This url 'https://mobile.element.io/.well-known/assetlinks.json' should be processed the same as 'https://app.element.io/.well-known/assetlinks.json'
2. Currently the web server 'element.io' with this url returns error 404
3. This affects the interception of the 'element-android' by the reserved url: https://mobile.element.io/?hs_url=https%3A%2F%2Fmatrix-client.matrix.org%2F&is_url=https%3A%2F%2Fvector.im%2F
   More details are described in this issue: Link to define custom homeserver/identity server automatically from https://app.element.io/mobile_guide/ does not work on Android 14 element-android#8904

Outcome

url: https://mobile.element.io/.well-known/assetlinks.json
is expected to return json, just like url: https://app.element.io/.well-known/assetlinks.json
Fixing this problem involves additional processing of the mobile.element.io domain by the web server.

Operating system

For everyone

Browser information

For everyone

URL for webapp

https://mobile.element.io/.well-known/assetlinks.json

Application version

For everyone

Homeserver

For everyone

Will you send logs?

No