Publicly Avaiable Grafana Dashboards

# Dashboard for Download

Grafana allows dashboards to be uploaded here https://grafana.com/grafana/dashboards. Grafana users can then easily import these dashboards into their instances. Lily should adopt this pattern making a set of dashboards available for download. This can also serve as a signal to users who have already created their own.

Some Dashboard ideas:
- Task completeness, Task Duration and Gaps in the Database
- Distributed indexing load, number of tasks in queues, queues throughput, and queue wait time
- Go metrics, memory usage, disk usage, go routines, GC runs.