The commit rephrases the README to focus on Cloud-Init setup and removes
unused Ansible code, making Tailscale configuration automatic.
Subject line: Replace Ansible with automated Cloud-Init configuration
Body: Refactors infrastructure bootstrapping to leverage Cloud-Init
instead of Ansible for initial VM setup, particularly with respect to
Tailscale installation and authentication.
This simplifies the architecture by: - Removing manual post-provisioning
Ansible steps - Automating Tailscale setup via Cloud-Init - Updating
documentation to reflect new workflow
Clarify pipelines for Prometheus metrics and Loki logs with better
structure and comments. Fix label for logs from "job" to "unit" and
correct forwarding to Loki destination. Remove duplicate endpoint block.
