nginx.conf with prerender.io

dev4g.com.tw.conf

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

  server_name www.dev4g.com.tw;

  return 301 https://$server_name$request_uri;
}

server {

    #listen 80;
    #listen [::]:80;

    listen 443 ssl default_server;
    listen [::]:443 ssl default_server;

    ssl_certificate /etc/nginx/ssl/dev4g.com.tw.crt;
    ssl_certificate_key /etc/nginx/ssl/private.key;

    server_name dev4g.com.tw www.dev4g.com.tw;
    root /var/www/websites/public;
    index index.php index.html index.htm;

    location / {
         try_files $uri $uri/ /index.php$is_args$args;
    }

    # map project2 when url contains lottery
    location ~ /lottery {
        alias /var/www/vue_lottery/dist;
                try_files $uri /index.html @prerender;
        #try_files $uri $uri/ /index.html last;
    }

    # map vuejs static folder.
    location /static {
        alias /var/www/vue_lottery/dist/static;
        try_files $uri @prerender;
    }


    location @prerender {
        proxy_set_header X-Prerender-Token x1Z2Ea2DPMpIXtW22jnY;

        set $prerender 0;
        if ($http_user_agent ~* "baiduspider|twitterbot|facebookexternalhit|rogerbot|linkedinbot|embedly|quora link preview|showyoubot|outbrain|pinterest|slackbot|vkShare|W3C_Validator") {
            set $prerender 1;
        }
        if ($args ~ "_escaped_fragment_") {
            set $prerender 1;
        }
        if ($http_user_agent ~ "Prerender") {
            set $prerender 0;
        }
        if ($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 $prerender 0;
        }

        #resolve using Google's DNS server to force DNS resolution and prevent caching of IPs
        resolver 8.8.8.8;

        if ($prerender = 1) {

            #setting prerender as a variable forces DNS resolution since nginx caches IPs and doesnt play well with load balancing
            set $prerender "service.prerender.io";
            rewrite .* /$scheme://$host$request_uri? break;
            proxy_pass http://$prerender;
        }
        if ($prerender = 0) {
            rewrite .* /index.html break;
        }
    }
    location ~ \.php$ {
        try_files $uri /index.php =404;
        fastcgi_pass php-upstream;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }

    location ~ /\.ht {
        deny all;
    }
}