Turn on flask debug

Change-Id: Icd54e010dd9b6cce05b3709f5adf42539ac1be01
diff --git a/person_detection/app.py b/person_detection/app.py
index 05eaba4..1386d63 100644
--- a/person_detection/app.py
+++ b/person_detection/app.py
@@ -63,4 +63,4 @@
 
 if __name__ == '__main__':
     args = build_argparser().parse_args()
-    app.run(host='0.0.0.0', threaded=False, processes=3)
+    app.run(host='0.0.0.0', debug=True)