Object-oriented Programming in Javascript - ES6

Set up

> docker run --rm -i -t -v /home/mikael/dev/docker/js/app:/usr/src/app -p 3000:3000 --name dockerjs node9 /bin/sh

> docker exec -it dockerjs /bin/sh

Class basics

The scope of a variable defined in a module is the module (not global). Modules are put in strict mode automnatically.