start django server script with gunicorn

start_server.sh

#!/bin/bash
set -e
LOGFILE=/var/log/apps/djangostart/console.log
LOGDIR=$(dirname $LOGFILE)
NUM_WORKERS=3
# user/group to run as
USER=ubuntu
GROUP=ubuntu
cd /home/ubuntu/apps/djangostart/
# setup
WORKON_HOME=$HOME/.virtualenvs
ENV_NAME=djangoenv
#source virtualenvwrapper.sh
#workon $ENV_NAME
source $WORKON_HOME/$ENV_NAME/bin/activate
test -d $LOGDIR || mkdir -p $LOGDIR
exec gunicorn_django -w $NUM_WORKERS \
  --user=$USER --group=$GROUP --log-level=debug \
  --log-file=$LOGFILE 2>>$LOGFILE