Pointing SAP UI5 App On prem in SAP FIORI Cloud Errors with 404

I am experimenting with having an SAP UI5 App deployed in the SAP S4 HANA On-Prem box and having it configured as an APP on SAP FIORI on Cloud. My config set up is as below:

When the app is tested, the following URL is generated.

https://<servername>:1443/sap/bc/ui2/flp/ui5appruntime.html?sap-ui-app-id=<component_name>&sap-startup-params=&sap-shell=FLP&sap-touch=0&sap-ui-versionedLibCss=true&sap-theme=sap_fiori_3&sap-iframe-hint=UI5&sap-client=100&sap-language=EN.

when debugging the back end system, system tries to find the path - /ui5appruntime.html and fails, which is obvious. Is this how we configure a UI5 app residing in the back end or am I missing something.

Referred few blog none seems to help. Any guidance would be appreciated.