How to publish another directory (/opt/xxx) while maintaining the document root

If you publish it as a subdirectory, I think it's easy to create symbolic links quickly.

Example: (Procedure to publish a directory other than the document root in Redmine)

$cd/var/www/html
$ sudorn-s/var/lib/redmine/public redmine

→ Browser accessible in the form localhost/redmine

As a reminder, the original directory you want to publish should be accessible to your web server's process (account).

There may be situations where you cannot operate the file system, so
Here's how to configure only httpd.conf.

There was an example close to this
https://serverfault.com/questions/295975/add-a-directory-to-the-apache-web-root

 Alias/opt-xxx/opt/xxx
<Directory/opt/xxx>
     Order allow, deny
     Allow from all
</Directory>

By writing like this,
http://hoge.com/opt-xxx/file1.jpg
->/opt/xxx/file1.jpg
You will have access similar to .