Update supervisord configuration to include gunicorn invocation

docker/supervisord-apache2.conf

@@ -3,3 +3,14 @@ command=/usr/sbin/apache2ctl -DFOREGROUND
 stdout_logfile=/dev/fd/1
 stdout_logfile_maxbytes=0
 redirect_stderr=true
+priority=2
+
+[program:gracedb]
+command=/usr/local/bin/gunicorn --reload --bind 0.0.0.0:8000 config.wsgi:application
+directory=/app/gracedb_project
+#user=www-data
+#group=www-data
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true
+priority=1