[Vote] Add apache/gravitino-mcp-server docker image in docker hub

[Fanng]

Hi,  I'm working on the Gravitino MCP server and planning to add
`apache/gravitino-mcp-server` docker image to facilitate the
deployment.  Please vote for your thoughts.

[ ] +1 - Approve
[ ] 0
[ ] -1 - Not approve

Best,
Xiaojing