pipe all requests to a particular port - node js application

I am trying to run node js and apache in a same server for that

I am trying to pipe all requests to a particular port (eg: example.com:80 to example.com:3000).

For that, I changed httpd.conf file located in "/etc/httpd/conf/httpd.conf"

Added these lines st the end

<VirtualHost *:80>
    ServerName mysite.com
    ProxyPreserveHost on
    ProxyPass / http://localhost:3000/
    ProxyPassReverse / http://localhost:3000/
</VirtualHost>

and restarted using sudo service httpd restart

but nothing changed.

There are more 2 httpd.conf files available ->

/usr/local/apache/conf/httpd.conf
/etc/httpd/conf/httpd.conf
/etc/apache2/conf/httpd.conf

at the end of /etc/apache2/conf/httpd.conf file I saw this:

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
#   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#   DO NOT EDIT. AUTOMATICALLY GENERATED.  USE INCLUDE FILES IF YOU NEED TO MAKE A CHANGE
#   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

I cannot understand the line USE INCLUDE FILES IF YOU NEED TO MAKE A CHANGE.

What should I do????

from pipe all requests to a particular port - node js application