LibreChat/client/nginx.conf

server {
  listen 80;
  server_name localhost;

  location /api {
    # Proxy requests to the API service
    proxy_pass http://api:3080/api;
  }

  location / {
    # Serve your React app
    root /usr/share/nginx/html;
    try_files $uri $uri/ /index.html;
  }
}