run.sh: Add '$GUNICORN_OPTS "$@"' to gunicorn invocation

This allows users to add custom arguments via the command line ($@) or
environment ($GUNICORN_OPTS), which is useful if you want to --preload
(or tweak some other setting) without editing your config file.

Author: wking

run.sh

@@ -6,4 +6,4 @@ GUNICORN_GRACEFUL_TIMEOUT=${GUNICORN_GRACEFUL_TIMEOUT:-3600}
 GUNICORN_SILENT_TIMEOUT=${GUNICORN_SILENT_TIMEOUT:-3600}
 
 cd "$(dirname $0)"
-exec gunicorn --access-logfile - --max-requests 100 --graceful-timeout $GUNICORN_GRACEFUL_TIMEOUT -t $GUNICORN_SILENT_TIMEOUT -k gevent -b 0.0.0.0:$REGISTRY_PORT -w $GUNICORN_WORKERS wsgi:application
+exec gunicorn --access-logfile - --max-requests 100 --graceful-timeout $GUNICORN_GRACEFUL_TIMEOUT -t $GUNICORN_SILENT_TIMEOUT -k gevent -b 0.0.0.0:$REGISTRY_PORT -w $GUNICORN_WORKERS $GUNICORN_OPTS "$@" wsgi:application