API: Add feedback form controller

[rajdip-b]

Description

We need to store feedbacks that users will post from our website. We will need to add a controller in the API layer to make this possible.

Solution

• Create a module named feedback
• Add a controller and a service class in it.
• In the service class, add a function called registerFeedback(feedback: string)
• Add a POST mapping in the feedback controller. The controller will be mapped under /api/feedback
• Mark the controller function as @Public()
• In the service class, validate that the feedback isn't null. Then, email [email protected] the feedback message. You can use the MailService class. You will need to add a method to this class, the interface, and the mock implementation.
• Add relevant tests for this in feedback.e2e.spec.ts

[rajdip-b]

🎉 This issue has been resolved in version 1.4.0 🎉

The release is available on GitHub release

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