RShiny app to display statistics for the Ansible Collections

This app is a Shiny application, built as an R package using Golem and deployed as a Docker container in ShinyProxy.

The app draws data from GitHub - the list of repos that it indexes is currently contained in a CSV file. See the crawler-config directory for details on the format.

(N.B. The crawler is likely to move to its own repo at some point).

As a Docker container, the app gets it's configuration via environment variables from ShinyProxy. An example block:

- id: collections-survival
 display-name: Survival Metrics for Ansible Collections
 description: Analysis of various time-to-event metrics for the Ansible Collections
 container-image: collections-survival
 container-env:
 DBUSER: test
 DBPASS: test
 DBPORT: 27017
 DBNAME: ansible_collections