server {
  listen 80;
  server_name://yourdomain.com # your actaul subdomain
  
  #root /var/www/familytree/familytreeui; #path to your build files
  #index index.html
  
   location / {
          proxy_pass         http://127.0.0.1:5000;
          proxy_http_version 1.1;
          proxy_set_header   Upgrade $http_upgrade;
          proxy_set_header   Connection keep-alive;
          proxy_set_header   Host $host;
          proxy_cache_bypass $http_upgrade;
          proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_set_header   X-Forwarded-Proto $scheme;
      }
  
  location /familytreeui/ {
    root /var/www/familytree; #path must exist like /var/www/familytree/familytreeui and /var/www/familytree/api folder.
    index index.html
    try_files $uri $uri/ /index.html;
  }
  # Optional: Cache static assets for better performance
      location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
          expires 30d;
          add_header Cache-Control "public";
      }
  
      error_page 404 /index.html;
}

# put in /etc/nginx/sites-availalble/familytreeapp.conf
# link to enable
# $) sudo ln -s /etc/nginx/sites-availalble/familytreeapp.conf /etc/nginx/sites-enabled/