Add images for expected output

subjects/bring-it-to-life/README.md

@@ -22,8 +22,7 @@ Reload the page - it's alive! Your JS brain has control and orders your HTML/CSS
 ### Expected output
 
 This is what you should see in the browser:
-
-<!-- screenshot -->
+![](bring-it-to-life.png)
 
 ### Notions
 

subjects/class-that/README.md

@@ -23,8 +23,7 @@ Note that you can attribute several classes to a same element ; create the class
 ### Expected output
 
 This is what you should see in the browser:
-
-<!-- screenshot -->
+![](class-that.png)
 
 ### Notions
 

subjects/nesting-organs/README.md

@@ -55,8 +55,7 @@ p {
 ### Expected output
 
 This is what you should see in the browser:
-
-<!-- screenshot -->
+![](nesting-organs.png)
 
 ### Notions
 

subjects/select-and-style/README.md

@@ -22,8 +22,7 @@ Here is an exemple of how to set the color of `div` tags to "red":
 ### Expected output
 
 This is what you should see in the browser:
-
-<!-- screenshot -->
+![](select-and-style.png)
 
 ### Notions