Add a Feathr sandbox helm chart

[blrchen]

The ask is add a Feathr sandbox helm charts. This sandbox refers to a pre-configured enviornment to experiment with Feathr feature store.

To achieve this, thsi sandbox helm chart should have following deployments to k8s

1. Redis
2. Pyspark
3. Jupyter Server
4. Feathr client
5. Feathr Registry
6. Feathr Online
7. Feathr Online UI demo

1-5 is already included in docker image feathrfeaturestore/feathr-sandbox. So possible proposal is

• Extend existing feathrfeaturestore/feathr-sandbox docker image and them make a single deployment for this docker image
• Created mutiple deployments in one helm chart. Isolated components in to different deployments.

[ahlag]

@blrchen Could you check the latest diagram?

• Feathr-Online: this only install feathr-online service
• Feathr-Online-Sandbox: this installs feathr online ui, feathr-online-service, redis

[ahlag]

Should Redis be incorporated in Xiaoyong's docker container or should we create a separate deployment?