Initialise repository structure and placeholder files. Generic functionality works i guess, need to come up with a better solution for compose templates

group_vars/README.md

@@ -0,0 +1,9 @@
+# Group Variables
+
+Group variables define shared defaults for every VM. Override them in environment
+or host-specific files rather than editing role tasks.
+
+Secrets, private keys, API tokens, and issued certificates must not be committed.
+Use Ansible Vault, SOPS, Vault, or Smallstep-backed workflows when those values
+are introduced.
+