Add starting architecture docs

docs/latest/SUMMARY.md

@@ -14,6 +14,8 @@
   - [Modules](advanced/extensions.md#modules)
   - [Registering](advanced/extensions.md#registering-extensions)
   - [OHIF Maintained](advanced/extensions.md#ohif-maintained-extensions)
+- [Architecture](advanced/architecture.md)
+  - Overview
 
 - Connecting to Image Archives
   - [DICOM Web](connecting-to-image-archives/dicomweb.md)

docs/latest/advanced/architecture.md

@@ -0,0 +1,5 @@
+# Architecture
+
+![Architecture Diagram](../assets/img/architecture-diagram.png)
+
+<center><i>architecture diagram</i></center>

docs/latest/architecture/index.md

@@ -1 +0,0 @@
-# Architecture