Design and implement a class representing a doubly linked list. The class must have the following requirements:

1. The linked list and the nodes must be implemented as C++ templates

2. The list must be generic it should not implement arithmetic/logic functions.

3. It must include a destructor, a copy constructor and operator=

4. It must include methods to insert at the front and at the back of the list

5. It must include a method to return the length of the list

6. It must provide an iterator-based interface for the user from front to back

7. It must include an iterator-based interface for the user from back to front

I need a header file and also a class and main class one important thing that we need a template