app.py

from flask import Flask
from flask import Response
import requests

app = Flask(__name__, static_url_path='/change_this_to_somthing_else_that_is_not_static')

basePath = 'https://create-react-app-example.vercel.app'

# basePath = 'https://www.intercom.com'


@app.route("/")
def serve_react_page():    
    return requests.get(basePath).text

@app.route('/<path:subpath>')
def projects(subpath):
    r = requests.get(basePath + '/' + subpath)
    return Response(r.text, mimetype=r.headers['Content-Type'])

if __name__ == '__main__':
  app.run(host='0.0.0.0', port=5000)