Image URLs not correctly set behind Apache proxy

I created this blog (post) from a JSON import. Ghost is running with Docker on localhost:2368 and is served to the public using Apache

ProxyPreserveHost On
# Servers to proxy the connection, or
# List of application servers Usage
ProxyPass / http://localhost:2368/
ProxyPassReverse / http://localhost:2368/

The image URL(s) point to localhost:2368 like

http://localhost:2368/content/images/2020/10/image_mini-5.png

instead of blog2.zopyx.com

Is there some configuration missing in order to make the images work?

Have you set the url in your Ghost config to “http://blog2.zopyx.com”?