An example extremely minimal and silly "init.d script".

init-d--application.sh

#!/bin/bash

ENV=production
BASE=/home/application

cd ${BASE}  # Could also slap /${ENV} on there, if that's how you're structuring.

# Activate the virtual environment.  Alter to taste.
source ${BASE}/bin/activate

# Apply local role-based configuration / "env file".
# http://12factor.net/config
source env/${ENV}.env  # Minor sec. warning, this is eval'ing the file, not running through "env".


function start() {
	# do the needful
}
 
function stop() {
	# disturb the calm
}

function status() {
	# as of a great many application workers, crying out in unison
}


case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	status)
		status
		;;
	restart)
		stop
		start
		;;
	*)
		echo "Usage: $0 {start|stop|status|restart}"
		exit 1
esac