As mentioned on our blog, we are deprecating our Rdesktop images. Currently, only the Ubuntu tags are being built. In 30 days, we will cease these builds and archive the baseimage and main repository.
These images were originally created because our initial implementation of Webtop used Apache Guacamole, which allowed us to easily offer images with identical build logic that simply lacked that layer. Now that we have transitioned to an in-house web-native protocol, these images are no longer required and have not been actively maintained.
If you require RDP access to an isolated desktop container, you will need to find an alternative. Otherwise, we recommend transitioning to Webtop.