[CHORE]: implemnt email confirmation for waitlist signup

[Dom-HTG]

Implement Welcome Email for Waitlist Signup

Description

When users sign up for the waitlist, they should receive a welcome email to acknowledge their signup and provide them with relevant information about the platform. This will enhance user engagement and set expectations.

Tasks

• Set up email service provider
• Implement welcome email endpoint
  • Craft a well-designed welcome email template
  • Send an email with a personalized message
• Write unit tests for the welcome email process
• Update Swagger documentation to include welcome email API

Technical Details

• Use a background job to send emails asynchronously
• Implement proper error handling and logging

Acceptance Criteria

• Users receive a welcome email upon signing up for the waitlist
• Email content is personalized and informative
• Email sending should be tested and reliable
• Unit tests should cover all key scenarios
• Swagger documentation should reflect new welcome email endpoints

Sample JSON Responses

Email Sent Response

{
  "status": "success",
  "message": "Welcome email sent successfully",
  "data": {
    "email": "[email protected]",
    "sent_at": "2025-02-28T12:00:00Z"
  }
}

Failed Email Sending Response

{
  "status": "failed",
  "message": "Failed to send welcome email",
  "error": {
    "code": "email_sending_failed",
    "details": "There was an issue sending the email. Please try again later."
  }
}