I'm trying to setup two websites on my 
Apache server.  One is www.domain.com and the other is test.domain.com.  Currently, my 000-default.conf file reads as follows:
<VirtualHost www:80>
        # The ServerName directive sets the request scheme, hostname and port that
        # 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 www.domain.com
        #ServerAlias www
        ServerAdmin 
[email protected]
        DocumentRoot /var/www/domain.com/
        # 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}/domain.error.log
        CustomLog ${APACHE_LOG_DIR}/domain.access.log combined
        UseCanonicalName on
        
        allow from all
        Options +Indexes
        
        # 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
</VirtualHost>
<VirtualHost test:80>
        DocumentRoot "/var/www/domain.com/test/"
        ServerName test.domain.com
        ServerAdmin 
[email protected]
        ErrorLog ${APACHE_LOG_DIR}/test.domain.error.log
        CustomLog ${APACHE_LOG_DIR}/test.domain.access.log combined
        UseCanonicalName on
        
        allow from all
        Options +Indexes
        
</VirtualHost>
# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
As is, when I use a browser to go to the www location, it show me a directory listing.  However, if I remove the www:80 on Line 1 and replace it with *:80, it correctly displays the webpage.  I don't understand why.
Can anyone help me configure this 000-default.conf file so that www goes to "/var/www/domain.com" and that test goes to "/var/www/domain.com/test"?  Thank you.