How to give an image from another folder in nginx if it is not in the current one?

Question

Nginx

Now the images are given like this: www.exmaple.com/img/xx123.png
img/ - the real directory relative to the root of the web server where the images are located. The name of the picture is always xxNNN.png, where xx is a non-changing character prefix, NNN is an integer.
It is necessary that if the xx123.png image is not in the img/ directory, nginx tries to serve it from some directory on the server that is not directly visible via the web, in which the images are with a different prefix in the file name, but with the same number.
For example, /home/myproject/myimg/yyy123.png
What directives and in what sections of the config should I add for this?

Answer 1

try_files