fix: ensure client_max_body_size 0 via entrypoint script

The entrypoint now injects client_max_body_size 0 at runtime if missing,
as a safety net against Docker layer caching of the nginx config.

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

neode-ui/Dockerfile.web

@@ -37,6 +37,7 @@ COPY neode-ui/docker/nginx-demo.conf /etc/nginx/nginx.conf.template
 COPY neode-ui/docker/docker-entrypoint.sh /docker-entrypoint-custom.sh
 RUN chmod +x /docker-entrypoint-custom.sh
 
+
 # Expose port
 EXPOSE 80