关于nginx的配置

下面这是我配置的，我觉的有问题，但又不知怎么去改。
第一次搞这玩意。
#user  www www;
worker_processes  1;error_log   logs/error.log crit;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;pid        logs/nginx.pid;
events {
    use epoll;
    worker_connections  1024;
}
http {
    include       mime.types;
    include       proxy.conf;
    default_type  application/octet-stream;    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';    access_log  logs/access.log  main;    sendfile        on;
    tcp_nopush      on;    #keepalive_timeout  0;
    keepalive_timeout  65;    #gzip  on;        server {
          listen       80;
          server_name  www.123.com;
          root /opt/apache-tomcat-6.0.26/webapps/myProject/;          access_log  off;
          rewrite_log on;          location / {
              proxy_pass  http://127.0.0.1:8080;
              proxy_redirect     off;
              proxy_set_header   Host             $host;
              proxy_set_header   X-Real-IP        $remote_addr;
              proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
          }          error_page   500 502 503 504  /50x.html;
          location = /50x.html {
              root   html;
          }
        }
    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    # 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  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    #    ssl_prefer_server_ciphers   on;    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}}