mettre plusieurs sites et plusieurs sous domaines sur nginx

Bonjour,

Slt je suis sous Jessie j'utilise nginx 1.10.2 mon vhost se trouve dans /etc/nginx/default.conf
voici ce que j'ai essayer de bricoler dans mon vhost pour pouvoir accéder à plusieurs sites

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;
    #access_log  /var/log/nginx/log/host.access.log  main;

    location / {
        #root   /usr/share/nginx/html;
        root   /home/emitic/webstation/emiticgroup/www;
        index  index.html index.htm ;
    }

    error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

    location ~ \.php$ {
         root           /home/emitic/webstation/emiticgroup/www;
    #    fastcgi_pass   127.0.0.1:9000;
         try_files $uri = 404; 
     fastcgi_pass unix:/var/run/php5-fpm.sock;
         fastcgi_index index.php;
         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
         include fastcgi_params;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}

server {
    listen       80;
    server_name localhost/adminer;

    #charset koi8-r;
    #access_log  /var/log/nginx/log/host.access.log  main;

    location /adminer {
        #root   /usr/share/nginx/html;
    root   /usr/share/adminer;
        index  index.html index.htm index.php;
    }

    error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

    location ~ \.php$ {
         root           /usr/share/adminer;
    #    fastcgi_pass   127.0.0.1:9000;
         try_files $uri = 404; 
     fastcgi_pass unix:/var/run/php5-fpm.sock;
         fastcgi_index index.php;
         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
         include fastcgi_params;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}

J'arrive à acceder au localhost sans probleme quand jessaie http://localhost/adminer je tombe sur ma page d'érreur