The CMD script writes MODEL_API_KEY to .env as OPENAI_API_KEY but
does not include it in config.yaml's model section. Hermes with
provider: custom reads api_key from model.api_key in config.yaml,
not from OPENAI_API_KEY in .env. This causes 401 Authentication
Fails when users start a conversation inside the container.
Fix: add api_key field to the generated config.yaml model section.
chrishuan