It is unclear where to put the Dockerfile. If you put it next to the `app` dir, the build will still succeed but the image will fail to start.
Using the official name `Node.js` should make it more accessible for beginners
Signed-off-by: mikesir87 <mikesir87@gmail.com> Imported from dockersamples/101-tutorial, removed other languages for now, and replaced PWD references with Docker Desktop.