proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=my_cache:10m
                 max_size=10g inactive=72h use_temp_path=off;

server {
    location / {
        expires max;

        resolver 8.8.8.8 ipv6=off;
        resolver_timeout 5s;

        proxy_cache my_cache;
        proxy_cache_valid 200 302 301 303 24h;
        proxy_cache_key $scheme://$host$request_uri";
        proxy_cache_use_stale error timeout http_500 http_502 http_503 http_504;
        proxy_ignore_headers Cache-Control Expires Set-Cookie;

        set $proxy_host "$http_host";
        set $url "$scheme://$http_host$request_uri";
        proxy_redirect off;
        proxy_set_header Host $proxy_host;
        proxy_set_header X-Forwarded-Host $http_host;
        proxy_pass "$url";
    }
}