Update app.py

app.py

@@ -51,9 +51,9 @@ def function2():
 def function3():
   book.changesrcnum(int(flask.request.args.get("srcnum")))
   return "srcnum changed"
-@app.route('/file/<path:filename>')
+@app.route('/file/images/<filename>')
 def serve_image(filename):
-  return flask.send_from_directory(filename)
+    return flask.send_from_directory('images', filename)
 
 if __name__ == '__main__':
     app.run("0.0.0.0",7860)