location ^~ /assets/ {
    proxy_pass http://127.0.0.1:52001;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-Port $server_port;
    proxy_set_header Connection "";
    proxy_http_version 1.1;

    proxy_cache memrelay_assets;
    proxy_cache_methods GET HEAD;
    proxy_cache_valid 200 30d;
    proxy_cache_lock on;
    proxy_cache_lock_timeout 120s;
    proxy_cache_lock_age 120s;
    proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
    proxy_cache_background_update on;
    proxy_ignore_headers Expires Cache-Control Set-Cookie;
    proxy_hide_header Set-Cookie;

    add_header X-Cache $upstream_cache_status always;
    add_header Cache-Control "public, max-age=31536000, immutable" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
}