Nginx root directive not allowed

  
user www-data;
worker_processes auto;
pid /run/nginx.pid;

root         /srv/localhost;

#location / {


events {
        worker_connections 768;
        # multi_accept on;
}

http {


        server {
        listen          80;
        server_name     10.0.0.115;
        index index.html;
        }



    sendfile on;
        tcp_nopush on;
        tcp_nodelay on;
        keepalive_timeout 65;
        types_hash_max_size 2048;

        include /etc/nginx/mime.types;
        default_type application/octet-stream;


        ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
        ssl_prefer_server_ciphers on;

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        gzip on;
        gzip_disable "msie6";  

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
include v.hosts/*.conf;
}