[doc][demo images] add mention of the demo images in root README

Also improve demo README

Signed-off-by: Marc Dumais <marc.dumais@ericsson.com>

README.md

@@ -2,6 +2,12 @@
 
 Trace viewer example applications and building blocks that can be used in or with them. Each application integrates either the [Eclipse Theia trace viewer extension](https://www.npmjs.com/package/theia-traceviewer) (npmjs.com) or the [Trace Viewer extension for VSCode](https://open-vsx.org/extension/eclipse-cdt/vscode-trace-extension) (open-vsx.org).
 
+---
+
+💡  _Are you looking for a way to quickly try a "batteries included" trace viewer example application, where everything is setup for you and ready-to-go?_
+
+- ⏩ Build and run one of our [Docker "demo" images](docker/theia-app-demo/README.md#build-the-demo-images)
+
 ## Requirements
 
 ### General Requirements

docker/theia-app-demo/README.md

@@ -1,10 +1,10 @@
 # Resources for the "theia-app-demo" Example docker image
 
-This folder contains the resources, needed to create a "demo" Docker image, based on one of the Theia app images. The demo image includes the necessary extras to easily perform a quick demo or immediately play with the trace viewer: the Eclipse Trace Compass Trace Server and a selection of Tutorial traces.
+This folder contains the resources, needed to create "demo" Docker images, based on the Theia app images. A demo image includes the necessary extras to easily perform a quick demo or immediately play with the trace viewer: the Eclipse Trace Compass Trace Server and a selection of Tutorial traces.
 
-## Build the demo images
+After connecting to one of the demo appliances with a browser, the trace viewer application should open with the trace server running and a workspace open, containing the tutorial traces, ready to use.
 
-After connecting to either the tate or tave application using a browser, following the instructions below, the app should open with the trace server running and the workspace already selected, containing the tutorial traces, ready to use.
+## Build the demo images
 
 Run the following commands from the parent folder (\<repo root\>/docker):