Base64 example

[mozey]

Create an example of using a base64 string, e.g.

// configBase64 must be compiled with ldflags,
// read config from env if this is not set
var configBase64 string

func main() {
	// Config
	if configBase64 != "" {
		err := config.SetEnvBase64(configBase64)
		if err != nil {
			log.Error().Stack().Err(err).Msg("")
			return os.Exit(1)
		}
	}
	conf := config.New()

	// ...
}

TODO Option to lock base64 values only, even if empty, i.e. don't read from env?