Add example usage to README

README.md

@@ -63,6 +63,9 @@ containers:
     mem_limit: 512m
     volumes:
       - "{{ appdata_path }}/unifi:{{ container_config_path }}"
+    depends_on:
+      - service: mongodb
+        condition: service_started
     include_global_env_vars: true
     restart: "{{ unless_stopped }}"
   - service_name: quassel
@@ -75,4 +78,4 @@ containers:
     mem_limit: 128m
     ports:
       - "4242:4242"
-```
+```