Write me! But here is a sample Apache .conf snippet. This uses mod_rewrite in order to provide extension-less URLs.
<IfModule !perfect_module>
LoadModule perfect_module /path/to/mod_perfect.dylib
</IfModule>
<IfModule !rewrite_module>
LoadModule rewrite_module libexec/apache2/mod_rewrite.so
</IfModule>
### Sample vhost
<VirtualHost *:80>
ServerName my-server.local
DocumentRoot "/path/to/my-server/webroot"
<Directory "/path/to/my-server/webroot">
Require all granted
DirectoryIndex index.moustache index.html
</Directory>
RewriteEngine on
# unless a directory, remove trailing slash
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ $1 [R=301,L]
# resolve .moustache file for extensionless moustache urls
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} !-d
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} !-f
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME}\.moustache -f
RewriteRule ^(.*)$ $1.moustache [NC,PT,L]
# redirect external .moustache requests to extensionless url
RewriteCond %{THE_REQUEST} ^[A-Z]+\ /([^/]+/)*[^.#?\ ]+\.moustache([#?][^\ ]*)?\ HTTP/
RewriteRule ^(([^/]+/)*[^.]+)\.moustache $1 [R=301,L]
<Location ~ "^.*\.[Mm][Oo][Uu][Ss][Tt][Aa][Cc][Hh][Ee]$">
SetHandler perfect-handler
</Location>
</VirtualHost>
### Sample vhost