Proxy to folder does not work

[apannwitz]

When using apache for proxy with:

  # proxy for konradkleine/docker-registry-frontend
 ProxyPass        / http://127.0.0.1:8080/
 ProxyPassReverse / http://127.0.0.1:8080/

it looks good. But when I want to use it in a different folder (e.g. /admin), it does not work.

  # proxy for konradkleine/docker-registry-frontend
  ProxyPass        /admin http://127.0.0.1:8080/
  ProxyPassReverse /admin http://127.0.0.1:8080/

it looks like this: