Changed table of content to table format

docs/index.md

@@ -1,14 +1,15 @@
 # Documentations
 
-- [Main](#main)
-- [Book](#book)
-- [Book Factory](#book-factory)
-- [User](#user)
-- [User Factory](#user-factory)
-
-<br>
+| Table of Content |
+| :--------------- |
+| [Main](#main) |
+| [Book](#book) |
+| [Book Factory](#book-factory) |
+| [User](#user) |
+| [User Factory](#user-factory)|
 
 # Main
+
 ## Functions
 
 | Return | Method | Description |