Update README.md

Author: alesanchezr

README.md

@@ -42,13 +42,11 @@ Clone the repository in your local environment and follow the steps below:
 
 ```bash
 $ npm i learnpack -g
-$ learnpack plugins:install learnpack-node
 ```
 
 2. Start the tutorial/exercises by running the following command at the same level where your learn.json file is:
 
 ```bash
-$ npm i jest@24.8.0 -g
 $ learnpack start
 ```