Create all locales instead of only en_US and en_AU

[adpe]

Hi @stronk7

What do you think, can we create all locales in the image? Or shall we dynamically add them within the moodle-docker compose script as environment variable?

Possible way would be to run this command cp /usr/share/i18n/SUPPORTED /etc/locale.gen instead of these two https://github.com/moodlehq/moodle-php-apache/blob/master/root/tmp/setup/php-extensions.sh#L39-L40.

Right now we've extended these lines and we're using our own image (https://github.com/ffhs/moodle-php-apache/commit/3bebee44ebc763f89f1bee4ccdd5d226e812fdf9).

Greets
Adrian