Add missing v to image tag

• Hardly worth a release, but better to tie up the loose end.

Build fixes

• Build fixes.
• Drop some ugly newlines from log entries.

Minor bugfixes

• Main loop bug fix.
• CI/CD config fix.

Initial release

First tagged release. Main functionality includes:

• Periodic polling of an endpoint (such as 'icanhazip.com')
• Can expose it's webhook that your logging system or other tooling can use to submit the latest IP address as it changes.