Add redis as an option for database

[schoolboybru]

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

Problem/Feature

Adding Redis as an option for a database.

Description of Changes:

1. Add all templates for redis
2. Make redis an option when selecting a database
3. Update documentation

Checklist

• I have self-reviewed the changes being requested
• I have updated the documentation (if applicable)

[Ujstor]

Ping is returning an error, and it is breaking the app when you curl the health route.

I think this solves the issue

func (s *service) Health() map[string]string {
	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
	defer cancel()

	result, err := s.db.Ping(ctx).Result()

	if err != nil {
		log.Fatalf(fmt.Sprintf("db down: %v", err))
	}

	 if result != "PONG" {
        log.Fatalf(fmt.Sprintf("Unexpected ping response: %s", result))
    }

	return map[string]string{
		"message": "It's healthy",
	}
}

[schoolboybru]

Oh good catch 👍

[Ujstor]

After fixing the Health func, this is ready for merge

[Ujstor]

LGTM