How to correctly set permissions for a folder and all its subdirectories?

Question

linux

Good day, such a problem, I have a directory in which users upload files, I set the rights to it sudo chmod 755 images / then in the folder itself I registered sudo chmod 644 * , I check everything works correctly, but after some time when the user uploads a picture, the server issues 403 and you have to repeat the whole procedure again. How to correctly set the rights so that when adding new files there would be no errors?

Answer 1

1. set the permissions for the entire site directory recursively using find
   And everything will pass.

Answer 2

man chown
The files have UID and GID, there is not a word about them in the question.