Users with a custom Anthropic-compatible endpoint (ANTHROPIC_BASE_URL) were
getting 401s because the OneCLI proxy injects ANTHROPIC_API_KEY=placeholder
and forwards to api.anthropic.com, overriding the custom endpoint and key.
Add a claude provider host config that reads ANTHROPIC_BASE_URL,
ANTHROPIC_AUTH_TOKEN, and CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC from .env
and passes them into the container. Also sets NO_PROXY for the custom host so
the OneCLI proxy doesn't intercept those requests.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
