Fix Docker port mapping: container listens on 3130, not 3000

The PORT env var overrides the internal port to 3130, so the mapping
must forward to 3130 instead of the Dockerfile default 3000.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -23,7 +23,7 @@ services:
       ALLOW_INSECURE_CALENDAR_HTTP: "${ALLOW_INSECURE_CALENDAR_HTTP:-false}"
       ALLOW_INSECURE_EXCHANGE_HTTP: "${ALLOW_INSECURE_EXCHANGE_HTTP:-false}"
     ports:
-      - "3130:3000"
+      - "3130:3130"
     volumes:
       - personal-dashboard-data:/data