link to tutorial: https://www.codementor.io/olatundegaruba/nodejs-restful-apis-in-10-minutes-q0sgsfhbd
This may help with routing: https://expressjs.com/en/guide/routing.html
next steps for hosting would be: https://www.quora.com/Where-can-I-host-a-node-js-app-for-free"# test_node_api"