added missing volume definition

Matthias Alt · Matthias Alt · commit cc6291ae2fed · 2019-03-21T14:19:42.000+01:00
diff --git a/docker-compose55.yml b/docker-compose55.yml
@@ -120,3 +120,4 @@ volumes:
   shopware55_php72:
   shopware55_php71:
   shopware55_php70:
+  shopware55_php56:
