Deploy the etherpads.html file

PTGbot recently gained the ability to list etherpads. We need
the Puppet module to deploy that new HTML file on the website.

Change-Id: I7b4eec97100d5fc3d8512fdecfebcd6f929a06ba
Depends-On: https://review.opendev.org/687884

manifests/init.pp

@@ -92,6 +92,18 @@ class ptgbot(
                 User['ptgbot']]
   }
 
+  file { '/var/lib/ptgbot/www/etherpads.html':
+    ensure    => present,
+    group     => 'ptgbot',
+    mode      => '0444',
+    owner     => 'root',
+    replace   => true,
+    require   => [File['/var/lib/ptgbot/www'],
+                  User['ptgbot']],
+    source    => '/opt/ptgbot/html/etherpads.html',
+    subscribe => Vcsrepo['/opt/ptgbot'],
+  }
+
   file { '/var/lib/ptgbot/www/index.html':
     ensure    => present,
     group     => 'ptgbot',