Home page

[ikopylov]

Linked issue: qoollo/bob#245

This page should contain common important information about whole cluster

1. Number of working/working with problems/not working nodes with color encoding
2. Number of working/working with problems/not working physical disks in cluster
3. Total cluster RPS, and RPS per operation type: Put, Get, Exist, Delete
4. Free and occupied disk space on cluster

Links to other pages of the GUI for simplicity (e.g. clicking on nodes should redirect to nodes page)

Minio console can be used as an example: https://blog.min.io/new-minio-console/