jetty9.3.11.tar.gz has inclued dubboamdin2.5.4 webapp. you should make sure docker-entrypoint.sh has executable privileges after clone.
Just use zookeeper for the key-value repository. You can run this image like this:
docker run --name dubboadmin2.5.4 -d -p 8080:8080 \
--link zookeeper:zookeeper changwentao/dubboadmin:2.5.4
dubbo.admin.root.password=root dubbo.admin.guest.password=guest
!!!zookeeper must use port 2181