refactor: dynamic SMTP for self host (#138)

Co-authored-by: KM Koushik <[email protected]>

.env.example

@@ -5,6 +5,9 @@ REDIS_URL="redis://localhost:6379"
 
 NEXTAUTH_URL="http://localhost:3000"
 
+NEXT_PUBLIC_SMTP_HOST=smtp.mailtrap.io  # Example SMTP host
+NEXT_PUBLIC_SMTP_USER=[email protected]  # Example SMTP user
+
 
 AWS_DEFAULT_REGION="us-east-1"
 AWS_SECRET_KEY="some-secret-key"