Testing with documentation tooling

Updating with changes
Updating for Hugo
Adding a README'
moving index.md compose-overview.md in links
changing overview
Updating image to pull

Signed-off-by: Mary Anthony <mary@docker.com>

docs/env.md

@@ -1,9 +1,15 @@
----
-layout: default
-title: Compose environment variables reference
----
+<!--[metadata]>
++++
+title = "Compose environment variables reference"
+description = "Compose CLI reference"
+keywords = ["fig, composition, compose, docker, orchestration, cli,  reference"]
+[menu.main]
+parent="smn_compose_ref"
+weight=3
++++
+<![end-metadata]-->
 
-Environment variables reference
+# Compose environment variables reference
 ===============================
 
 **Note:** Environment variables are no longer the recommended method for connecting to linked services. Instead, you should use the link name (by default, the name of the linked service) as the hostname to connect to. See the [docker-compose.yml documentation](yml.md#links) for details.
@@ -34,7 +40,7 @@ Fully qualified container name, e.g. `DB_1_NAME=/myapp_web_1/myapp_db_1`
 
 ## Compose documentation
 
-- [User guide](index.md)
+- [User guide](compose-overview.md)
 - [Installing Compose](install.md)
 - [Get started with Django](django.md)
 - [Get started with Rails](rails.md)