如何为yii2 Advanced配置VittualHost？

Question

我尝试在使用Docker时为yii2高级应用程序配置VirtualHost。这是一个vhost.conf：

<VirtualHost *:80>   
ServerName frontend.test
DocumentRoot /app/frontend/web/

<Directory "/app/frontend/web/">
     # use mod_rewrite for pretty URL support
        RewriteEngine on
        # If a directory or a file exists, use the request directly
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteCond %{REQUEST_FILENAME} !-d
        # Otherwise forward the request to index.php
        RewriteRule . index.php

        # use index.php as index file
        DirectoryIndex index.php

        # ...other settings...
        # Apache 2.4
        Require all granted

        ## Apache 2.2
        # Order allow,deny
        # Allow from all
</Directory>
</VirtualHost>

<VirtualHost *:80>   
ServerName backend.test
DocumentRoot /app/backend/web/

<Directory "/app/backend/web/">
     # use mod_rewrite for pretty URL support
        RewriteEngine on
        # If a directory or a file exists, use the request directly
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteCond %{REQUEST_FILENAME} !-d
        # Otherwise forward the request to index.php
        RewriteRule . index.php

        # use index.php as index file
        DirectoryIndex index.php

        # ...other settings...
        # Apache 2.4
        Require all granted

        ## Apache 2.2
        # Order allow,deny
        # Allow from all
</Directory>
</VirtualHost>

对于url localhost：8000，我得到站点的前端应用程序，ServerName frontend.test对我不起作用。有人可以解释一下如何正确配置此文件吗？以及如何获得后端应用程序？