Update README.md

Author: jhades

README.md

@@ -42,17 +42,27 @@ Its also possible to install the modules as usual using npm:
 
     npm install 
 
-Yarn has the big advantage that if you use it you will be installing the exact same dependencies than I installed in my machine, so you wont run into issues caused by semantic versioning updates.
+NPM 5 or above has the big advantage that if you use it you will be installing the exact same dependencies than I installed in my machine, so you wont run into issues caused by semantic versioning updates.
 
 This should take a couple of minutes. If there are issues, please post the complete error message in the Questions section of the course.
 
-# To Run the Development Server
+# To Run the Development Backend Server
 
-We can start the chat  application with the following command:
+We can start the sample application backend with the following command:
 
-    npm start
+    npm run server
 
-  The application is visible at port 4200 - [http://localhost:4200](http://localhost:4200)
+This is a small Node REST API server, and it uses HTTPS.
+
+# To run the Development UI Server
+
+To run the frontend part of our code, we will use the Angular CLI:
+
+    npm start 
+
+The application is visible at port 4200, but you need to use HTTPS - [https://localhost:4200](https://localhost:4200)
+
+This application uses a self-signed certificate, so you will need to accept it using the browser. If you are using Chrome, you will need to click Advanced and then choose "Proceed to localhost".
 
 # Installing branches other than master