Update app.py

app.py

@@ -28,9 +28,9 @@ def get_today_dataframe():
     return get_dataframe(hopsworks_tomorrow_path)
 
 def get_dataframe_of(day):
-    if   (day == 'today'):
+    if   (day.lower() == 'today'):
         return get_today_dataframe()
-    elif (day == 'tomorrow'):
+    elif (day.lower() == 'tomorrow'):
         return get_tomorrow_dataframe()
 
 def get_possible_destinations():