Prepare Ansible and the Inventory

Prepare the Ansible configuration and the Inventory for accessing all the required hosts.

Checklist

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[x] My pull request follows the guidelines set out in CONTRIBUTING.md.
[x] I have performed a self-review of my code and run any tests locally to check.
[ ] I have added tests that prove my changes are effective and work correctly.
[x] I have made corresponding changes to the documentation as needed.
[x] I have checked my code and corrected any misspellings.
[x] Each commit in this pull request has a meaningful subject & body for context.
[x] I have squashed all "fix(up)" commits to provide a clean code history.
[x] My pull request has an appropriate title and description for context.
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