Update composer intro docker container

[annielmenezes]

When I use:

$ azk shell --image azukiapp/php-fpm --shell /bin/bash
# composer create-project laravel/laravel my-app --prefer-dist
# exit

The container returns an warning needing to update Composer
Warning: This development build of composer is over 60 days old. It is recommended to update it by running "/usr/local/bin/composer self-update" to get the latest version.

You could update the version 5.6 of the container, please?

[gullitmiranda]

I'm sorry for the delay in replying. A few days update the image.

But we are intending to redo these images using the alpine.