setup script

[ashwin31]

script to setup docker-box on first installation
for os: ubuntu-16.04-x64

• update os
• install docker if its not available
• enable docker api mode
• add firewall rule to disallow anyone to access docker api from outside
• install postgres latest
• install nginx
• install and configure uswgi
• install all necessary packages for django
• create user and configure it in django project
• create admin user and give the password to login
• project should run on some port like 23949
• it will be better if it can be configured on a domain by taking input from user as part of installation process. then, we can run it with ssl provided by certbot.
• generate dynamic django secret key. store and serve it using ENV. This makes sure not to mess up when we update the project.