关于tomcat+Nginx https配置

想请教一下，Tomcat上用OpenSSL生成的自签名证书可以访问工程，由于服务器上是tomcat+nginx，所以需要配置Nginx，但是不太清楚怎么配置，尤其是root那儿，具体root对应的是什么，它指向的路径不知怎么配，我配了好长时间启动和访问都报错，难道tomcat下的工程需要拷贝到nginx的html路径下吗？求大牛指导谢谢！

server {
        listen       80;
        server_name  localhost;
 
        location / {
            root   html;
            index  index.html index.htm;
        }
 
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
 
    # HTTPS server
    #
    #server {
    #    listen       443;
    #    server_name  localhost;
 
    #    ssl                  on;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;
 
    #    ssl_session_timeout  5m;
 
    #    ssl_protocols  SSLv2 SSLv3 TLSv1;
    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers   on;
 
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}