In file /etc/apache2/sites-available/000-default.conf
<VirtualHost *:80>
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
ProxyPass / http://localhost:7000/
</VirtualHost>
When I type in the browser the address http://example.com I get a response from the application running on port 7000. What needs to be added in the settings so that when typing http://example.com in the browser, I would receive the contents of the /var/www/html/ directory, and when typing http://example.com/emby/, the response from the application on port 7000?
As per https://httpd.apache.org/docs/2.4/mod/mod_proxy.html you need to do
ProxyPass "/emby" "http://localhost:7000/"
ProxyPassReverse "/emby" "http://localhost:7000/"
Keep in mind that ProxyPass and ProxyPassReverse do not rewrite any HTML or JS so if you have for example a SPA that loads from / or uses some absolute path, it may stop working.
Found a solution to my problem in this answer: httpd - reverse proxy on multiple ports
As a result, the setting looks like this:
ProxyPass /emby/ http://localhost:7000/
ProxyPassReverse /emby/ http://localhost:7000/
I also created a folder:
mkdir /var/www/html/emby