ref(docs): concepts before architecture

Author: slack

mkdocs.yml

@@ -6,8 +6,8 @@ site_name: Deis Documentation
 pages:
   - Welcome: index.md
   - Understanding Deis:
-    - Architecture: understanding-deis/architecture.md
     - Concepts: understanding-deis/concepts.md
+    - Architecture: understanding-deis/architecture.md
     - Components: understanding-deis/components.md
   - Installing Deis:
     - Quick Start: installing-deis/quickstart.md

src/index.md

@@ -4,7 +4,7 @@ Deis (pronounced DAY-iss) Workflow is an open source Platform as a Service (PaaS
 
 To get started with Workflow, follow our [Quick Start][quickstart] guide.
 
-For more detailed information about Workflow view the [Architecture][arch] and [Concepts][concepts] sections.
+For more detailed information about Workflow view the [Concepts][concepts] and [Architecture][arch] sections.
 
 [arch]: understanding-deis/architecture.md
 [concepts]: understanding-deis/concepts.md