Address GH Rate Limits for dynamic image building

[jmunroe]

Context

In our dynamic image building, one of the first steps is to clone the repo with the steps

Waiting for build to start...
Picked Git content provider.
Cloning into '/tmp/repo2docker***

During the Project Pythia Cookoff 2025, we had 50+ participants each selecting 'Build Your Own Image' from a their own personal fork. We hit a limitation due to GitHub rate limiting.

From the GitHub docs (https://docs.github.com/en/rest/using-the-rest-api/rate-limits-for-the-rest-api) we learned that unauthenticated GitHub API is limited to 60 request / hour. Authenticated users are are limited to 5000/hr.

With 50+ users, we hit an error message saying

Rate limit exceeded. Try again in 3600 seconds.

What we need to do

Since the rate limits for for GitHub apps is 5000 requests /hr, it is proposed to modify the dynamic image building so that a 2i2c managed GitHub app is used to do the pull for dynamic image building.

Definition of Done

• The feature/service is technically complete
• The feature/service been tested with one or more users (if applicable)
• The feature/service been deployed to a production cluster
• The feature/service has been shown to be replicably deployable
• The feature/service is well documented, and the documentation is accessible for the target user base
• The feature/service has been added to our product menu (if applicable).
• Lessons learned have been documented
• The feature's availability has been communicated to Sales
• The feature has been communicated to our communities

[jmunroe]

This situation was observed in during the Project Pythia Cookoff 2025 event.