Puppet module for installing and configuring the backdrop application.

It does:

• Create required directories in /etc/gds, /opt and /var/log
• Create an nginx vhost
• Create a python virtual environment
• Create a gunicorn configuration
• Create an upstart job

It does not: (and therefore must be done manually for the moment)

• Copy the application code into /opt/{app name}
• Copy correct configuration files into place /opt/{app name}/backdrop/{module name}/config/{environment}.py
• Install requirements.txt into virtualenv
• Update /etc/hosts with read.backdrop and write.backdrop hosts names

The manual steps can be made a lot simpler if the backdrop app is packable and it's configuration is managed outside of the app.

backdrop::app { 'read.backdrop':
	port       => 3038,
	workers    => 4,
	app_module => 'backdrop.read.api:app',
}