Users should be able to set Default value in the configs

[wgarunap]

Currently users cannot set default values for env configs. if would be nice if users can add a default values to the configs.

Example

type Conf struct {
	Host string `env:"HOST" default:"localhost:8080"`
}

[coderx31]

Struct tags such as envDefault are used to specify default values for fields. These values are automatically applied if the corresponding environment variable is not set.
Example

type Config struct {
	Name     string `env:"MY_NAME" validate:"required"`
	Team     string `env:"MY_TEAM" envDefault:"Backend"`
	Username string `env:"MY_USERNAME" secret:"true" validate:"required"`
	Password string `env:"MY_PASSWORD" secret:"true" validate:"required"`
}

[wgarunap]

@coderx31 Thanks for pointing it out. Then we only have to update the documentation and the examples. Users should be aware about these features and we can utilize this issue to track the documentation update.