我在Linode Ubuntu 20.04 LTS上部署了Django网站：confirm the settings via command line。每当我尝试使用计算机访问它时，无论是否添加www，它都可以正常工作。今天，我的朋友试图从他的android设备中签出它，并且出现了apache2默认页面。这仅发生在android设备（或可能是所有移动设备）上。我也尝试过使用BlueStacks。如果没有www，它将显示默认的apache2页面。请出什么问题。我真的需要你的帮助。谢谢前进。 我用letsencrypt来获取SSL。我的alahaberry-le-ssl.conf看起来像这样：

 <IfModule mod_ssl.c>
<VirtualHost *:443>
        # The ServerName directive sets the request scheme,hostname and port th>        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts,the ServerName      
        # specifies what hostname must appear in the request's Host: header to   
        # match this virtual host. For the default virtual host (this file) this 
        # value is not decisive as it is used as a last resort host regardless.  
        # However,you must set it for any further virtual host explicitly.      

        ServerName alahaberry.com
        ServerAlias www.alahaberry.com
        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html

        # Available loglevels: trace8,...,trace1,debug,info,notice,warn,# error,crit,alert,emerg.
        # It is also possible to configure the loglevel for particular
        # modules,e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined 
# For most configuration files from conf-available/,which are
        # enabled or disabled at a global level,it is possible to
        # include a line for only one particular virtual host. For example the   
        # following line enables the CGI configuration for this host only        
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf


        Alias /static /home/admin/alahaberry/static
        <Directory /home/admin/alahaberry/static>
                Require all granted
        </Directory>

        Alias /media /home/admin/alahaberry/media
        <Directory /home/admin/alahaberry/media>
                Require all granted
        </Directory>

        <Directory /home/admin/alahaberry/alahaberry>
                <Files wsgi.py>
                        Require all granted
                </Files>
        </Directory>

        WSGIScriptAlias / /home/admin/alahaberry/alahaberry/wsgi.py
        WSGIDaemonProcess alahaberry_app python-path=/home/admin/alahaberry pyth>        WSGIProcessGroup alahaberry_app


SSLCertificateFile /etc/letsencrypt/live/www.alahaberry.com/fullchain.pem        
SSLCertificateKeyFile /etc/letsencrypt/live/www.alahaberry.com/privkey.pem       
Include /etc/letsencrypt/options-ssl-apache.conf
</VirtualHost>
</IfModule>