Add section about computing cost

[jules32]

Share slides we have about cost so far from AWS, including

We also learned about [hub url]/metrics (https://openscapes.2i2c.cloud/hub/api/metrics) from Yuvi’s awesome blog post. I search for active_users and see this today:

# HELP jupyterhub_total_users total number of users
# TYPE jupyterhub_total_users gauge
jupyterhub_total_users 813.0
# HELP jupyterhub_active_users number of users who were active in the given time period
# TYPE jupyterhub_active_users gauge
jupyterhub_active_users{period="24h"} 20.0
jupyterhub_active_users{period="7d"} 33.0
jupyterhub_active_users{period="30d"} 49.0

[alexishunzinger]

We can also include examples from NSIDC and Coiled.

• AWS Cost Explorer Tips and Tricks

• Processing Terabyte-Scale NASA Cloud Datasets with Coiled

[itcarroll]

Continue discussion in #349.