HA rejects proxied requests (400 Bad Request) without trusted_proxies
in configuration.yaml. Uses entrypoint wrapper pattern (like romm) to
ensure the http config block exists before HA starts.
Handles both fresh deploys (creates full configuration.yaml) and
existing installs (appends http block if missing).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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