I want to config the storage backend as hbase, would you consider supporting?
Sure, that makes sense. I think we currently simply lack config files for HBase. Do you want to create a pull request to add them?
They just need to be added here: https://github.com/JanusGraph/janusgraph-docker/tree/master/build/conf
similar to other config files there. I guess we want one config file with only HBase without a search backend and then optionally config files for HBase in combination with Solr or Elasticsearch. After adding this / these config file(s) there, one only needs to execute ./update.sh to update the files also for the currently supported versions and ideally update the description in the README.md to include the added values for JANUS_PROPS_TEMPLATE.