*.sock 파일의 권한으로 인해 nginx와 uwgsi가 connection을 맺지 못함 chmod 666 *.sock
- http://vladikk.com/2013/09/12/serving-flask-with-nginx-on-ubuntu/
- http://haruair.com/blog/1900
- https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-uwsgi-and-nginx-on-ubuntu-14-04
- http://flask.pocoo.org/docs/0.10/deploying/uwsgi/
- http://bayron.tistory.com/entry/nginx%EC%99%80-uwsgi%EB%A5%BC-%EC%82%AC%EC%9A%A9%ED%95%98%EC%97%AC-flask-application-%EB%B0%B0%ED%8F%AC%ED%95%98%EA%B8%B0-flask-nginx-uwsgi
- https://spoqa.github.io/2012/01/16/wsgi-and-flask.html
- https://ko.wikipedia.org/wiki/%EC%9B%B9_%EC%84%9C%EB%B2%84_%EA%B2%8C%EC%9D%B4%ED%8A%B8%EC%9B%A8%EC%9D%B4_%EC%9D%B8%ED%84%B0%ED%8E%98%EC%9D%B4%EC%8A%A4
- http://software-engineer.gatsbylee.com/python-wsgi-server%EC%99%80-%EA%B4%80%EB%A0%A8%EB%90%9C-%EA%B3%B5%EB%B6%80/
- http://advent.perl.kr/2014/2014-12-12.html
- http://flask-docs-kr.readthedocs.org/ko/latest/deploying/uwsgi.html