updated Dockerfile & 00-helloWorld.md

.gitpod.Dockerfile

 FROM gitpod/workspace-full:latest
 
-USER gitpod
\ No newline at end of file
+RUN sudo apt update && sudo apt upgrade -y
+
+USER trainee
\ No newline at end of file

.learn/00-helloWorld.md

@@ -19,9 +19,9 @@ def hello_world():
 	return 'Hello, World!'
 ```
 
-First lets talk about the code.
+First, lets talk about the code.
 
-1. FIrst we imported the Flask class. An instance of this class will be our WSGI application.
+1. First we imported the Flask class. An instance of this class will be our WSGI application.
 2. Next we create an instance of this class.
 3. We then use the route() decorator to tell Flask waht URL should trigger our function.
 4. The function is given a name which is also used to generate URLs for that particular function, and returns the message we want to display in the user’s browser.