WIP: feat(sharkey): add ansible role for deployment

roles/sharkey/tasks/configure-docker-compose.yml

@@ -0,0 +1,7 @@
+---
+- name: Ensure compose files are downloaded
+  ansible.builtin.get_url:
+    # TODO: how to avoid redownloading default.yml when the role made changes?
+    url: "{{ sharkey_compose_file_url }}"
+    dest: "{{ sharkey_compose_upstream_file }}"
+