Why is the symbol link (centos) not created?

Question

linux

Friends, hello everyone!
I'm trying to forward the mounted file through docker to the web server directory to start.
Command:
ls -s /main/pymain.py /var/www/python/
In response I get:

4 /main/pymain.py

/var/www/python/:
total 0

What does this mean? And how to create a symbolic link in a directory?
Copying a file works fine, but you yourself understand that you don’t want to transfer every change to the directory by copying.

Answer 1

Let's start with the fact that ls is a list , it shows a list of files, but the ln - link
command is needed. Further, if the file is in a docker container, then it will not get to the host, /var/www/python and the web server must be in the same container as /main/pymain.py