Remove type checking in ts-node to improve dev experience

[VivekFitkariwala]

Because type checking is coupled with traspilation it takes more time to start the server and also restart. So decoupling both of them will create better dev experience.
Type checking should be moved as a separate command and it should also be checked before committing the code and in CI/CD flow.

[jerith666]

The code will still be type-checked when it's compiled, though, right? :)

[VivekFitkariwala]

@jerith666 Yup it will a separate npm command. I have also added description.
I am planning to use husky as pre git commit hook for type checking and lints.

Also for local development use SWAGGER_ENABLED=false (if swagger end point is not needed) as it takes a lot of time.