Update: README.md for including general information on how to use this repo

Author: BlackBeast593

README.md

@@ -1,13 +1,25 @@
 # Leetcode 75 Notes
+Exercises taken from the Leetcode 75 interview problem compilation. Each exercise folder has the
+following files:
+```sh
+$ tree 283-move-zeroes 
+283-move-zeroes     # Exercise name
+├── index.js        # Solution implementation
+├── package.json    # Contains execution scripts
+├── README.md       # Problem description
+└── test.js         # Test cases implementation
+
+```
 
 ## `package.json` scripts
+You can use the following scripts on each exercise:
 ```json
 {
   // ...
   "scripts": {
-    "start": "node index.js",
-    "debug": "node --inspect-brk index.js",
-    "test": "node test.js"
+    "start": "node index.js",               // Starts the program
+    "debug": "node --inspect-brk index.js", // Starts the program in debug mode
+    "test": "node test.js"                  // Run the test suite for this exercise
   },
   // ...
 }