upgrade to Angular 4

Author: jhades

README.md

@@ -3,6 +3,8 @@
 
 This repository contains the full application of the course Angular and Firebase - Build a Web Application, so this contains the complete application like it will look like at the end of the course. 
 
+This course repository is updated to Angular 4, there is a Yarn lock file available.
+
 [Angular and Firebase - Build a Web Application](https://angular-university.io/course/build-an-application-with-angular2)
 
 ![Angular firebase course](https://angular-academy.s3.amazonaws.com/thumbnails/angular_app-firebase-small.jpg)
@@ -12,13 +14,22 @@ This repository contains the full application of the course Angular and Firebase
 If you are looking for a clean starting point for coding along as you follow the course, please check this [repository](https://github.com/angular-university/angular-firebase-app-starter) instead.
 
 
+# Which Course are You Looking For ?
+
+Below is a list of the Angular University courses:
+
+# Angular University Lessons Code
+Contains the code for all the Angular University courses.
+
+![Angular for Beginners course](https://angular-academy.s3.amazonaws.com/thumbnails/angular2-for-beginners-small.png)
+
+If you are looking for the Complete Angular With Typescript Course, the repo can be found here:
+
 # Complete Typescript 2 Course - Build A REST API
 
 If you are looking for the Complete Typescript 2 Course - Build a REST API, the repo with the full code can be found here:
 
-[Complete Typescript 2 Course - Build A REST API](https://angular-university.io/course/typescript-2-tutorial)
-
-[Github repo for this course](https://github.com/angular-university/complete-typescript-course)
+[Complete Typescript 2 Course - Build A REST API](https://github.com/angular-university/complete-typescript-course)
 
 ![Complete Typescript Course](https://angular-academy.s3.amazonaws.com/thumbnails/typescript-2-small.png)
 
@@ -27,13 +38,19 @@ If you are looking for the Complete Typescript 2 Course - Build a REST API, the
 
 If you are looking for the Angular Ngrx Reactive Extensions Architecture Course code, the repo with the full code can be found here:
 
-[Angular Ngrx Reactive Extensions Architecture Course](https://angular-university.io/course/angular2-ngrx)
-
-[Github repo for this course](https://github.com/angular-university/ngrx-course)
+[Angular Ngrx Reactive Extensions Architecture Course](https://github.com/angular-university/ngrx-course)
 
 ![Angular Ngrx Course](https://angular-academy.s3.amazonaws.com/thumbnails/ngrx-angular.png)
 
 
+# RxJs and Reactive Patterns Angular Architecture Course
+
+If you are looking for the RxJs and Reactive Patterns Angular Architecture Course code, the repo with the full code can be found here:
+
+[RxJs and Reactive Patterns Angular Architecture Course](https://angular-university.io/course/reactive-angular-architecture-course)
+
+![RxJs and Reactive Patterns Angular Architecture Course](https://s3-us-west-1.amazonaws.com/angular-academy/blog/images/rxjs-reactive-patterns-small.png)
+
 
 # Installation pre-requisites
 
@@ -58,6 +75,15 @@ The code can be installed with the following command (needs to be run in the fol
 
     npm install 
 
+If you prefer the Yarn package manager, instead of npm install you can also run:
+
+    yarn
+
+Although npm install would also work, its recommended to use Yarn to install the course dependencies. 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.
+
+This should take a couple of minutes. If there are issues, please post the complete error message in the Questions section of the course.    
+
 
 ## Running the code
 Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.