server {
    listen 80;
    listen [::]:80;
    server_name domain.tld;
    access_log off;
    root /srv/http/domain.tld/dist/chat;
    include /etc/nginx/acme.conf;
    location / {
        return 301 https://domain.tld$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name domain.tld;

    ssl_certificate /etc/letsencrypt/live/domain.tld/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/domain.tld/privkey.pem;

    access_log /var/log/nginx/domain.tld.access.log;
    error_log /var/log/nginx/domain.tld.error.log;
    root /srv/http/domain.tld/dist/appname;

    location / {
        try_files $uri @dumpdom;
    }

    location @dumpdom {
        proxy_set_header Host $host;
        set $dumpdom 0;
        if ($http_user_agent ~* "googlebot|bingbot|yandex|baiduspider|twitterbot|facebookexternalhit|rogerbot|linkedinbot|embedly|quora link preview|showyoubot|outbrain|pinterest|slackbot|vkShare|W3C_Validator|whatsapp|DuckDuckBot|redditbot|Discordbot|Viber") {
            set $dumpdom 1;
        }
        if ($args ~ "_escaped_fragment_") {
            set $dumpdom 1;
        }
        if ($http_user_agent ~ "Prerender") {
            set $dumpdom 0;
        }
        if ($uri ~* "\.(js|css|xml|less|png|jpg|jpeg|gif|pdf|doc|txt|ico|rss|zip|mp3|rar|exe|wmv|doc|avi|ppt|mpg|mpeg|tif|wav|mov|psd|ai|xls|mp4|m4a|swf|dat|dmg|iso|flv|m4v|torrent|ttf|woff|svg|eot)") {
            set $dumpdom 0;
        }
        if ($prerender = 1) {
            proxy_pass http://127.0.0.1:9292;
        }
        if ($prerender = 0) {
            rewrite .* /index.html break;
        }
    }
}