proxy_cache_path /var/cache/nginx/proxy_cache_dir/example.com levels=1:2 keys_zone=example.com:100m max_size=700m inactive=6h use_temp_path=off;

proxy_buffers 256 16k;
proxy_buffer_size 32k;

server {
        listen 80;
        listen [::]:80;

        server_name example.com;

        include snippets/letsencrypt.conf;

        location / {
                return 301 https://example.com\$request_uri;
        }
}

server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;

        access_log  /var/log/nginx/example.com_access.log;
        error_log   /var/log/nginx/example.com_error.log;

        server_name example.com;
        root /var/www/html;

        # SSL
        ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
        ssl_trusted_certificate /etc/letsencrypt/live/example.com/fullchain.pem;

        # WordPress cookies (https://www.cookielawinfo.com/wordpress-cookies-list-why-they-are-used/)
        if ($http_cookie ~* "wordpress_(?!test_cookie)|comment_author_" ) {
            set $no_cache 1;
        }

        # URLs
        if ($request_uri ~* "/wp-admin/|wp-.*.php|/feed/|/xmlrpc.php|sitemap(_index)?.xml") {
            set $no_cache 1;
        }

        # reverse proxy
        location / {
            proxy_cache example.com;
            proxy_cache_valid 200 304 6h;
            proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
            proxy_cache_bypass $no_cache;
            proxy_no_cache $no_cache;
            proxy_cache_background_update on;
            proxy_cache_lock on;
            proxy_cache_key $scheme$host$uri;
            proxy_ignore_headers Expires;
            proxy_ignore_headers Cache-Control;
            
            proxy_pass http://0.0.0.0:8080;
            include snippets/proxy.conf;
        }
}