add network mounted volumes[WIP]

[angad-k]

Now the database contents are being uploaded correctly to seaweedfs. However, on terminating gasper, because seaweedfs is running as a thread in it, seaweedfs gets terminated and the databases crash without getting a chance to close gracefully. In a recent meeting with scar and kps ,we decided the solution to this would be running seaweedfs as a docker container.

[supra08]

@angad-k Can you specify in the PR description what all things are WIP for this PR and what all are covered. Would be easy to review then.