Add a temporary hack to upgrade gevent and greenlet in Docker

[robertknight]

gevent is used by both uWSGI and pywb. pywb pins it to v22.10.2. However there have been fixes for the version of Python we are using in v24.2.1. In order to test whether the older version of gevent is responsible for hangs we are seeing in production, update gevent in the Docker container.

Testing:

• Build docker container locally with make docker
• Run viahtml container with make run-docker
• Run the local via service using make dev, and check that you can browse to http://localhost:9083/https://example.org/

See also:

• gevent changelog
• Slack thread

[marcospri]

This seems to run fine with some very light testing.

I'd say is worth the risk to rule this out as the main problem.