Migrate Express Server to TypeScript

[Abhay-2811]

Convert the Express server code to TypeScript, adding proper type definitions for requests and responses.

[Nkovaturient]

hey there, @Abhay-2811
just to confirm, we have to convert the server.js express setup into typescript as aforementioned, right?
kindly assign me under PLDG Cohort-2 contributions. 😊

[SuchitraSwain]

@Abhay-2811 @Nkovaturient Please review this PR - #47

I have updated all files to typescript

[VeerChaurasia]

hey @Abhay-2811 is this issue open to work??

[SuchitraSwain]

PR is already there