Fix Docker session creation

[karlnaden]

Summary

Previously, when this test kit was run locally in docker, users creating sessions within the Inferno UI would be redirected to a page on port 4567 which was not found. Now, users are correctly redirected to the main Inferno UI for the session.

Additionally, internal certificates used for testing and demonstration had expired, causing unit tests to fail. Now, they have been re-generated (script).

Testing Guidance

1. Start the test kit using docker.
2. Open http://localhost in a web browser.
3. Click the "Start Testing" button.
4. Confirm that a web page for the testing session opens correctly.

[ljtucker]

What do these changes to the stored keys have to do with the missing inferno host endpoint?

[karlnaden]

What do these changes to the stored keys have to do with the missing inferno host endpoint?

The previous ones were expired which was causing spec test failures. I regenerated them using a script in the repo. Arun pointed out that they refer to a MITRE email address, so we're going to hold off on finalizing this until we've decided how to replace it. I updated the description of this PR to include that information.