Provisioning may fail if `local_wan_ip_address` is IPv6 about selfhost HOT 6 CLOSED

We could either update the README to explicitly support only IPv4, or look into how much effort supporting IPv6 will be.

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I had to change the "icanhazip.com" to something else, it kept returning IPV6:

https://github.com/forem/selfhost/blob/main/roles/preflight/tasks/main.yml#L4-L9

- name: Fetch public WAN IP json
  ansible.builtin.uri:
    url: https://checkip.amazonaws.com/
    return_content: yes
  changed_when: no
  register: local_wan_json

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@0bserver07 If you have time to PR this change we'd merge it. If not I can do it later.

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Hi there, just a quick update from me on my testing with this so far.

Previously I was getting this issues when deploying into an existing VPC (I have no default ones). No ipv6 configured.

Yesterday I recreated a fresh default VPC, again with no ipv6 - just all the defaults, same issue.

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fresh default VPC, again with no ipv6

Hey @leewynne! Note that this issue refers to the "Fetch public WAN IP json" Ansible task (which is run locally on your workstation) returning an IPv6 address, and is not related to your cloud configuration. I have updated the issue content to make that more clear.

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Ah right! that makes total sense now - thanks for that 😎😎😎

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