docs(docker-compose): Update example directory layout

docker-compose/README.md

@@ -111,8 +111,9 @@ Above example of a multi-component (two in this case) `grafana` service will giv
     ├── common-settings.yml
     ├── docker-compose.override.yml
     ├── docker-compose.yml
-    └── env
-        └── fully.qualified.domain.name.example
+    ├── env
+    │   └── fqdn_context.env.example
+    └── README.md
 ```
 Check out file contents over in the [examples/grafana](examples/grafana) subdir.
 
@@ -131,8 +132,9 @@ With an alternative single-component `hashicorpvault` service the result may loo
     ├── common-settings.yml
     ├── docker-compose.override.yml
     ├── docker-compose.yml
-    └── env
-        └── fully.qualified.domain.name.example
+    ├── env
+    │   └── fqdn_context.env.example
+    └── README.md
 ```
 Check out file contents over in the [examples/hashicorpvault](examples/hashicorpvault) subdir.