ansible: add fallback for gunicorn_reloader.path service

ansible/roles/gunicorn/tasks/main.yml

@@ -47,8 +47,17 @@
     group: root
     mode: 0644
 
+- name: Start and enable gunicorn_reloader path-monitoring service, with fallback
+  block:
   - name: Start and enable gunicorn_reloader path-monitoring service
-  service:
+    systemd_service:
       name: gunicorn_reloader.path
       state: started
       enabled: true
+  rescue:
+  # Likely Docker; systemctl3.py doesn't support .path, so enable .service here
+  - name: Start and enable gunicorn.service (if .path service fails)
+    systemd_service:
+      name: gunicorn.service
+      state: started
+      enabled: true