fix: frontend missing networks section in docker-compose

wordly-network was listed under environment: instead of networks:,
so the frontend container couldn't communicate with the backend.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker-compose.yml

@@ -148,6 +148,7 @@ services:
     environment:
       - NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL:-https://wordly.art}
       - NEXT_PUBLIC_GOOGLE_CLIENT_ID=${NEXT_PUBLIC_GOOGLE_CLIENT_ID:-}
+    networks:
       - wordly-network
     depends_on:
       backend: