Two bugs fixed:
1. SMS echo loop: Telnyx delivers our own outbound messages back to the
webhook, causing the system to process its own replies as new requests.
Added isOwnNumber() check to skip messages from system phone numbers.
2. Sender authorization: Added findAuthorizedSite() to verify that the
sender is in the allowedSenders list for the receiving phone number,
preventing unauthorized messages from being processed.
3. Empty manifest: The server Dockerfile runs from /app/server/ but
REPO_ROOT defaulted to '.', causing content/sections/ to resolve to
/app/server/content/sections/ (doesn't exist) instead of
/app/content/sections/. Added ENV REPO_ROOT=/app to the Dockerfile.
Added new sms/config.ts module that loads config/sms-sites.json at
runtime (with 60-second cache) and provides isOwnNumber() and
findAuthorizedSite() checks.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
