Docker SSH key mismatch

[heck-gd]

Description

When running FAME under Docker, there is a mismatch between key shown and key used for private module pulling.

Steps to Reproduce

1. Set up a fresh FAME instance using docker compose.
2. Add a private module, copying the displayed public key.
3. Note how authentication fails.

Expected behavior

The application uses the key it shows in web UI to authenticate to git.

Actual behavior

fame_web and fame_updater each generate an RSA key and don't share it, causing the user to wonder what could possibly have gone wrong.