Setting up a React and Python appilication in ubuntu server

I have an Ubuntu server ready for production and a custom domain that is already registered. The stack running on that machine is a React front-end, a Python API, and Mongodb for data storage. What I’m missing is the final wiring that turns all of this into a publicly reachable, secure site.

Here’s what I expect as concrete deliverables:
1. Install Python and setup api to accessible remotely
2. Install Node JS and React and setup domain and run required npm install ensure site is accessible with SSL
3.