docs: add architecture diagram to readme

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.0.8] - 2020-06-16
+
+### Added
+
+- an architecture diagram giving an overview of how the EMo Viewer works and interacts with a backend.
+
 ## [0.0.6] - 2020-06-09
 
 ### Added

README.md

@@ -82,6 +82,10 @@ To establish a link to the backend, the viewer's entrypoint in `src/index.templa
 
 The entrypoint should point to the collection you want to be displayed.
 
+## Architecture
+
+![Architecture diagram of the EMo viewer](img/emo_architecture.png)
+
 ## Contributing
 
 Please read [CONTRIBUTING.md](CONTRIBUTING.md) for details on our code of conduct, and the process for submitting pull requests to us.