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

roles/postgres/defaults/main.yml

@@ -0,0 +1,17 @@
+---
+postgres_name: postgres
+postgres_dir: /srv/docker/postgres
+postgres_image: postgres:17-alpine
+postgres_routing_mode: host
+postgres_env:
+  POSTGRES_USER: postgres
+  POSTGRES_PASSWORD: "{{ vault_postgres_password | default('CHANGE_ME_IN_VAULT') }}"
+  POSTGRES_DB: postgres
+postgres_directories:
+  - "{{ postgres_dir }}"
+  - /srv/data/postgres
+postgres_volumes:
+  - /srv/data/postgres:/var/lib/postgresql/data
+postgres_ports:
+  - { host: 5432, container: 5432, protocol: tcp }
+