1. Application setup steps

This simple nodejs app starts on port 3000 and logs some info on startup.

to prepare the app for startup, installing all the dependencies

npm install

to start the application

npm start or node app/server.js

to build the image from Dockerfile

docker build -t nodejs-app:1.0 .

to start the built docker image

docker run nodejs-app:1.0

to build an archive file

npm pack