fix: use npm_default network (actual NPM network name on VPS)

docker-compose.yml

@@ -4,10 +4,10 @@ services:
     container_name: humanai-landing
     restart: unless-stopped
     networks:
-      - npm_proxy
+      - npm_default
     # Port is NOT exposed to host — traffic goes through Nginx Proxy Manager only.
     # In NPM, proxy host → http://humanai-landing:80
 
 networks:
-  npm_proxy:
+  npm_default:
     external: true