added comments

backend/internal/config/resource.go

@@ -6,6 +6,7 @@ import (
 	"git.schreifuchs.ch/schreifuchs/ng-blog/backend/internal/auth"
 )
 
+// Config holds configuration settings for the application, loaded from environment variables.
 type Config struct {
 	Port   int         `env:"PORT"`
 	Host   string      `env:"HOST"`
@@ -13,6 +14,7 @@ type Config struct {
 	Auth   auth.Config `env:"AUTH"`
 }
 
+// Default returns a default configuration with pre-defined values.
 func Default() *Config {
 	return &Config{
 		Port:   8080,