Added missing ToC

Author: RoelantVos

README.md

@@ -6,11 +6,13 @@ A documentation library containing reusable design- and solution patterns.
 
 Please have a look at [the introduction documentation](./docs/index.md) to get started!
 
+The automatically-generated documentation site is available on [GitHub pages](https://data-solution-automation-engine.github.io/data-solution-framework/).
+
 ## Implementation
 
 This repository is intended to be cloned and modified for organisation-specific scenarios. All files are text-based (MarkDown format, by default) for convenient editing and collaboration using Git. A DocFX file is also provided to generate static HTML from the repository's contents.
 
-To generate the content as a website (on localhost port 8081), please run the following from the root directory of the repository:
+To generate the content as a website (on localhost port 8081), please run the following from the 'docs' directory of the repository:
 
 ```azurepowershell
 docfx docfx.json --serve -p 8081

docs/solution-architecture/toc.yml

@@ -1,3 +1,10 @@
-items:
-- name: Overview
+- name: Introduction
   href: index.md
+- name: Solution Architecture Overview
+  href: data-integration-framework-reference-solution-architecture-1-overview.md
+- name: Staging Layer
+  href: data-integration-framework-reference-solution-architecture-2-staging-layer.md
+- name: Integration Layer
+  href: data-integration-framework-reference-solution-architecture-3-integration-layer.md
+- name: Presentation Layer
+  href: data-integration-framework-reference-solution-architecture-4-presentation-layer.md