Use periodic task to collect metrics for landing page display

[manning-ncsa]

Instead of dynamically rendering the landing page transient statistics by querying the database and constructing a bar chart every time the page is requested, we could use a Celery Beat periodic task to pre-render this content such that static files are served instead. Some ideas for implementation:

• The numerical values could be directly saved to the static HTML file on disk by rendering an HTML template.
• The bar chart could be rendered as a static image file instead of an interactive widget given the lack of need for interactivity here.

These static files would ideally be stored in the existing static files depot that is served by the NGINX proxy instead of the Blast API server.