Unable to get Apache docker container to serve virtual host with subdomain - apache

Question

I have a site I currently run that works well, but both to learn and to make it more portable, I've been trying to dockerize it. I'm using the offical apache and php images, and setup my virtual hosts identical to how I have on the running site, just with different domains. Unfortunately, while I can get one to work, the second does not.
NameVirtualHost *:80
<VirtualHost *:80>
ServerName api.gamersplane.local
DocumentRoot /var/www/api
ErrorLog "/var/log/gamersplane.api"
CustomLog "/var/log/gamersplane.api" common
ProxyPassMatch ^/(.*\.php(/.*)?)$ fcgi://api:9000/var/www/$1
ProxyPassReverse ^/(.*\.php(/.*)?)$ fcgi://api:9000/var/www/$1
RewriteEngine On
RewriteBase /
RewriteRule !\.(css|jpg|js|gif|png|ico|eot|woff|ttff|svg|psd)$ dispatch.php
<Directory /var/www/api/>
Options FollowSymLinks
Require all granted
</Directory>
LogLevel notice
</VirtualHost>
<VirtualHost *:80>
ErrorLog "/var/log/gamersplane"
CustomLog "/var/log/gamersplane" common
ProxyPreserveHost On
ProxyPassMatch ^/(.*\.php(/.*)?)$ fcgi://api:9000/var/www/$1
ProxyPassReverse ^/(.*\.php(/.*)?)$ fcgi://api:9000/var/www/$1
ServerName gamersplane.local
ServerAlias *.gamersplane.local
DocumentRoot /var/www
RewriteEngine On
RewriteBase /
RewriteRule !\.(css|jpg|js|gif|png|ico|eot|woff|ttff|svg|psd)$ dispatch.php
<Directory /var/www/>
Options FollowSymLinks
Require all granted
</Directory>
LogLevel notice
</VirtualHost>
Originally, I had the first vhost (api.gamersplane) second, but thought maybe it was the server alias that was the problem. Then I switched positions, and even commented out the base (gamersplane.local), but had no luck. This works on the running site, so I can't figure out what's wrong with it.
Checking the headers returned by Postman, I do see it has the Apache and PHP headers, so it seems to be hitting SOMETHING, I just don't know what.