What are the steps to take to create a Docker image of an application that works with node, mongo?

Question

Node.js

There is a small application on node that uses Npm modules and contacts the mongoDB database.
You need to create a docker image from this application. I read the documentation, I realized that I need a dockerfile, in which, using from, you specify just ubuntu, node, mongo. What to do next, what steps to take?

Answer 1

RTFM?
https://nodejs.org/en/docs/guides/nodejs-docker-webapp/