doc: Add documentation for the module in README.md

README.md

@@ -1,2 +1,29 @@
 # pic-word-gen
 A word generator module for using in a pictionary
+
+# Installation
+
+```
+
+npm install pic-word-gen
+
+```
+
+# Usage
+
+- To generate a word, require the module and call `generateWord` function
+- Pass in the level of difficulty of the words as a parameter to the `generateWord` function
+- Allowed levels are 
+    - easy
+    - medium
+    - hard
+- Default level is `easy` if no level is passed to the `generateWord` function
+```
+
+const wordgen = require('pic-word-gen')
+
+let easyWord = wordgen.generateWord('easy')
+let mediumWord = wordgen.generateWord('medium')
+let hardWord = wordgen.generateWord('hard')
+
+```