SvelteKit Nginx config -- nodejs adapter

mydomain.com.conf

upstream sveltekit-server {
  server 127.0.0.1:3000;
  keepalive 8;
}

server {
  listen 80;
  server_name mydomain.com;

  root /home/deploy/frontend/build/client;

  location / {
    try_files $uri $uri/ @sveltekit;
  }

  location @sveltekit {
    proxy_set_header Host $http_host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-NginX-Proxy true;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Sendfile-Type X-Accel-Redirect;

    proxy_pass http://sveltekit-server;
    proxy_redirect off;

    # error_page 502 = @static;
  }

  location ^~ /_app/immutable/ {
    # gzip_static on;
    expires max;
    add_header Cache-Control public;
    access_log off;
    try_files $uri $uri/ @sveltekit;
  }
}

You can also make the use of immutable in cache

-add_header Cache-Control public;
+add_header Cache-Control public, immutable;