我用pm2运行了一个node的示例程序（express的示例程序），目前可以用http://127.0.0.1:3000 打开，现在我想用自己自定义的域名打开，但是我用nginx配置之后还是不能用自定义域名(http://mydomain.com)打开，用127.0.0.1或localhost是可以的，是不是还要在本机配置host呢？但是在网上找了一圈nginx配置经验或说明没有一个说还要改host，希望能有人解答。

附上nginx.conf的配置信息

#user nobody; worker_processes 1; #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { worker_connections 1024; } http { include mime.types; 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; upstream nodejs { server 127.0.0.1:3000; } server { listen 80; server_name www.mydomain.com mydomain.com; #charset koi8-r; #access_log logs/host.access.log main; location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-Nginx-Proxy true; proxy_set_header Connection ""; proxy_pass http://nodejs; #root html; #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 html; } } include servers/*; }