https://goo.gl/sZUBVC

server.conf

server {
    listen                      80;
    server_name                 example.com dev.example.com;
    root                        /var/www/sites/public/dev.example/;
    index                       index.html index.htm index.php;
    
    access_log                  /var/log/nginx/example.com_access.log;
    error_log                   /var/log/nginx/example.com_error.log;

    charset                     utf-8;
    open_file_cache             max=2000 inactive=20s;
    open_file_cache_valid       60s;
    open_file_cache_min_uses    3;
    open_file_cache_errors      off;
   
    gzip                        on;
    gzip_comp_level             2;  
    gzip_types text/plain text/css text/javascript application/javascript application/json application/x-javascript text/xml application/xml;
    gzip_disable "MSIE [1-6]\.";

    # Allow robots but disable logging 
    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }
    
    # Pretty url
    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }
    
    error_page  404              /404.html;
        location = /usr/share/nginx/error/404.html {
        root       /usr/share/nginx/error/;    
    }

    error_page   500 502 503 504  /50x.html;
        location = /usr/share/nginx/error/50x.html {
        root       /usr/share/nginx/error/;
    }

    # Caching assets
    location ~ \.(js|css|png|jpg|gif|swf|ico|svg|xml)$ {
        fastcgi_hide_header        Set-Cookie;
        open_file_cache            max=2000 inactive=14d;
        open_file_cache_errors     off;
        open_file_cache_min_uses   3;
        open_file_cache_valid      1m;
        output_buffers             1  2m;
        expires                    14d;
        access_log                 off;
        log_not_found              off;
     }

    location ~ \.php$ {
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
        # enable only if you want nginx to intercept php errors and throw vauge nginx errors
        #fastcgi_intercept_errors on;
    }
    
    # Deny access to htaccess and htpasswd files
    location ~ /\.ht {
        deny  all;
    }
}