Call a rpg program from a node script running on an external windows or linux server

Hi everyone, I may soon find myself in the situation in question: a web app 
running on a Linux or Windows server needs to access data on the Power Server. 
Obviously, this involves structured information based on a well-defined and 
consolidated calculation in a business logic managed by three RPG programs that 
have been doing their job effectively for 20 years. The only change was made 
about twenty years ago, and a parameter was added to the programs that simply 
creates an PF-DTA object as an output file with this data to be later managed.
So, back to the point: what's the best way to allow a Node.js script running on 
a Linux (or Windows) server to connect with a specific user to a Power Server on 
IBM i 7.3 or 7.5 and make a call pgm1(parm1); wait a few milliseconds for the 
execution time and then retrieve a database file? Has anyone had similar 
experiences? Perhaps encapsulate the pgm in an SQL function?
Thanks in advance to anyone who can share their experiences.
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