Feature/add dockerfile

[kaiomagalhaes]

Adding dockerfile and a script to make easier to run it.

To run the project and get all the dependencies now you only need to run:

sh bin/dev

Now you are inside a docker container, you dont need to have npm or node in your local machine.

Just run inside your docker machine

npm install

You can be on your windows, linux or mac and it will work the same.

[kaiomagalhaes]

@Granze Once it merged maybe would be good to update travis to use the dockerfile as well.