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


instead of

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

Have you set the url in your Ghost config to “”?