This PR is the solution of 4 bank project

[PinJinx]

• What all did you learn?
• I learned a lot of cool new things in this task mainly how to create a back-end and how to work with servers
• Any difficulties that you faced, and how you solved it?
• Learning how to do things with sever like sending requests was difficult at start then it became easier with the rest of tasks
• Did you have to learn anything new to do the assignments?
• No, Most of the things was already provided in the assignment
• Any thing else you would like to share about the topic?
• May be like an rather than just giving a server. An intro to how the server receives,sends and stores data would be nice.