* elastic use include

+ add secrets to example

docker-compose.yml.example

@@ -44,3 +44,11 @@ services:
 
 volumes:
   database:
+
+secrets:
+  user_ssh_key:
+    file: ~/.ssh/id_rsa
+  user_known_hosts:
+    file: ~/.ssh/known_hosts
+  composer_auth:
+    file: ~/.composer/auth.json