File to REST interface in SAP PI 7.4 single stack

Hello Experts,

We are working on SAP PI 7.4 single stack & the requirement is SAP ECC integration with Cloud API [Outbound interface with respect to SAP ECC] . In SAP ECC of tcode AL11 a Flat File will be placed & PI has to pick that file and then transfer it to receiver system as it is using REST protocol. No transformation of structures required here this is a passthrough scenario. The File should be posted to an URL using REST adapter in PI. This is first time connection between PI & receiver cloud system. Kindly guide me on pre-requisite setup required for connectivity , configuration etc,. & help on receiver REST channel configuration part in PI. Also please guide me on sender file channel configuration regarding the interface.

Thanks,

Ramu.