There are any number of swival and hinge TV Monitor mounts you can use where one end will be mounted on the inside wall and then you can swing the whole TV Monitor out through the opened RV Storage door. These mounts will have the standard VESA TV mounts on the other end to support your TV Monitor.
Something like this mount should be what you need to look for.
These would be available from most TV stores like WALMART and of course plenty to look at on AMAZON.com
Typical Install to the inside wall of the storage bay might look something like this...
Roy Ken