Update app.py

app.py

@@ -146,7 +146,7 @@ def process_and_compare(file1, sheet1, file2, sheet2):
     plt.xticks(rotation=90)
 
     # Save plot to a file
-    file_path = '/output/plot.png'
+    file_path = 'output/plot.png'
     plt.savefig(file_path, format='png', bbox_inches='tight')
     plt.close()