Update app.py

app.py

@@ -5,8 +5,8 @@ import os
 
 def create_portfolio_graph(amount):
     # Calculate positions based on the provided amount
-    long_position = os.getenv['LONG_PORTION'] * amount
-    short_position = os.getenv['SHORT_PORTION']* amount
+    long_position = os.getenv(['LONG_PORTION']) * amount
+    short_position = os.getenv(['SHORT_PORTION'])* amount
 
     # Data for the bars
     positions = ['Long Position', 'Short Position']