repo: Rename compose templates to compose.yaml.jinja

It is a short, concicse name for the compose (and one of the ways that
docker officially recommends to name the files), and jinja is the
careful recommendation of the jinja docs.

https://jinja.palletsprojects.com/en/stable/templates/#template-file-extension

roles/grocy/templates/compose.yaml.jinja

@@ -0,0 +1,43 @@
+services:
+  grocy:
+    container_name: grocy
+    image: lscr.io/linuxserver/grocy:latest
+    networks:
+      - caddy
+    environment:
+      - PUID={{ stack_grocy_puid }}
+      - PGID={{ stack_grocy_pgid }}
+      - TZ={{ stack_grocy_tz }}
+      - UMASK_SET={{ stack_grocy_umask_set }}
+    volumes:
+      - "{{ arrstack_env_dir }}/config/grocy:/config"
+    restart: unless-stopped
+    labels:
+      caddy: "{{ stack_grocy_subdomain }}"
+      caddy.reverse_proxy: "{{ '{{' }}upstreams 80{{ '}}'}}"
+
+{% if restic_enable is not undefined and not false and stack_grocy_restic_enable is not undefined and not false %}
+  backup:
+    image: mazzolino/restic
+    hostname: "{{ ansible_hostname }}"
+    environment:
+      TZ: "{{ restic_tz }}"
+      SKIP_INIT: true
+      BACKUP_CRON: "{{ stack_grocy_restic_cron }}"
+      RESTIC_REPOSITORY: "{{ restic_repo }}"
+      RESTIC_PASSWORD: "{{ restic_pass }}"
+      AWS_ACCESS_KEY_ID: "{{ restic_s3_key }}"
+      AWS_SECRET_ACCESS_KEY: "{{ restic_s3_secret }}"
+      RESTIC_BACKUP_ARGS: >-
+        --tag grocy
+      RESTIC_BACKUP_SOURCES: "/backup"
+    volumes:
+{% if restic_repo is regex('^/.+') %}
+      - "{{ restic_repo }}:{{ restic_repo }}"
+{% endif %}
+      - "{{ stack_grocy_env_dir }}:/backup/{{ stack_grocy_env_dir }}"
+{% endif %}
+
+networks:
+  caddy:
+    external: true