Add existing codebase

config.go

@@ -0,0 +1,22 @@
+package link
+
+import (
+	"github.com/knadh/koanf"
+	"github.com/knadh/koanf/providers/env"
+	"strings"
+)
+
+func NewConfig() *koanf.Koanf {
+	config := koanf.New(".")
+
+	loadValues(config)
+
+	return config
+}
+
+func loadValues(c *koanf.Koanf) {
+	envProvider := env.Provider("", ".", func(s string) string {
+		return strings.Replace(strings.ToLower(s), "_", ".", -1)
+	})
+	_ = c.Load(envProvider, nil)
+}