add gunicorn capabilities

app.py

@@ -15,4 +15,9 @@ def index():
     return jsonify(count=out)
 
 
-app.run(host="0.0.0.0", port=int("8080"), debug=False)
+if __name__ != '__main__':
+    import logging
+
+    gunicorn_logger = logging.getLogger('gunicorn.error')
+    app.logger.handlers = gunicorn_logger.handlers
+    app.logger.setLevel(gunicorn_logger.level)