用独立二级域名结合gitbook后端服务

server {
    server_name homs.coder4.com;

    location / {
            proxy_pass http://localhost:4000;
            proxy_set_header  Host $host;
            proxy_buffering   off;
    }

}

路径转发，可以不用启动gitbook serve服务端，直接定向到文件夹即可

    location /homs_online {
        alias /home/coder4/code/hands-on-microservices/_book;
    }

注意_book是需要gitbook build的