Missing py-netaddr for alpine image #49

Hi,

From a ansible template i am using the ipaddr filter like this sample

{{ '10.10.0.1/24' | ipaddr('address') }}

Running this template with docker image williamyeh/ansible:alpine3 will throw this ansible error

The ipaddr filter requires python-netaddr be installed on the ansible controller

Installing it on hosts does not help. Is it possible to add this statement inside the Dockerfile ?

apk add py-netaddr

Maybe you prefere a pull request than an issue ?

Source:
https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters_ipaddr.html

Regards,