right-tree/nginx.conf

http {
  server {
    listen 80;
    include       /etc/nginx/mime.types;
    proxy_set_header        Host $http_host;

    location / {
        proxy_pass http://frontend:3000;
    }

    location ~* ^/(api|admin) {
      proxy_pass http://backend:8000;
    }
  }
}


events {
    # configuration of connection processing
}