Dockerize Paper Hacker News

[mihaigalos]

This PR dockerizes Paper Hacker News for easy distribution and scalability.

Building:

docker build -t paper-hn .

Running (default settings):

docker run -it -p 8080:8080 paper-hn 

Running (specify refresh frequency):

docker run -it --env "REFRESH_INTERVAL=60" -p 8080:8080 paper-hn

Your news are now accessible over at localhost:8080 in your favorite browser.