Add Github action for performing a Capistrano deploy for new tag

[lewismc]

Building off of https://github.com/tagbase/tagbase-server/pull/155 we should add a GitHub Action which is executed upon each new created tag e.g.

on:
  push:
    tags:
      - '*'

A specific example can be found at https://github.com/marketplace/actions/capistrano-deploy#workflow-file