docs: refactor architecture section to be more aligned with other docs sites (#235)

website/data/docs-navigation.js

@@ -7,13 +7,13 @@
 //   serve as the category title in the sidebar
 
 export default [
-  'security-model',
   {
     category: 'architecture',
-    content: ['terminology', 'domain-model', 'reference-deployment'],
-  },
+    content: [
+      'security-model',
+      'reference-architecture',
       {
-    category: 'domain-model',
+        category: 'concepts',
         content: [
           'actions',
           'auth-methods',
@@ -32,6 +32,8 @@ export default [
           'users',
         ],
       },
+    ],
+  },
   {
     category: 'command-line',
     content: ['login'],

website/pages/docs/architecture/domain-model.mdx

@@ -1,9 +0,0 @@
----
-layout: docs
-page_title: Architecture
-sidebar_title: Domain Model
-description: |-
-  Watchtower domain model
----
-
-# Domain Model

website/pages/docs/architecture/reference-architecture.mdx

@@ -1,11 +1,11 @@
 ---
 layout: docs
 page_title: Architecture
-sidebar_title: Reference Deployment
+sidebar_title: Reference Architecture
 description: |-
-  Watchtower reference deployment and considerations
+  Watchtower reference architecture and considerations
 ---
 
 # Overview
 
-When deploying Watchtower in an on premise environment some considerations should be taken. The aim of this document is to provide minimum requirements for deploying Watchtower and a reference deployment model to follow in doing so.
+When deploying Watchtower in an on premise environment some considerations should be taken. The aim of this document is to provide minimum requirements for deploying Watchtower and a reference architecture model to follow in doing so.

website/pages/docs/architecture/security-model.mdx

@@ -1,6 +1,6 @@
 ---
 layout: docs
-page_title: Security Model
+page_title: Architecture
 sidebar_title: Security Model
 description: |-
   Watchtower security model