How to transfer save files on a container with Nginx?

Question

PHP

Hello.
I'm sitting on a bunch of Nginx + Php-fpm, each process is a separate container in Docker.
I want to receive a file in php, validate it, and if it is suitable, save it already on the container with Nginx. As far as I understand this can be done using proxy_store but I don't understand how it works (maybe you know a good example?) or are there other more accepted ways?

Answer 1

Add for each container volume to the desired directory.