feat: config files

internal/config/config.go

@@ -0,0 +1,25 @@
+package config
+
+import "github.com/knadh/koanf"
+
+var (
+	K = koanf.New(".")
+)
+
+type Config struct {
+	DB struct {
+		Host     string `koanf:"host"`
+		Username string `koanf:"username"`
+		Password string `koanf:"password"`
+		Database string `koanf:"database"`
+		SSLMode  string `koanf:"ssl_mode"`
+	} `koanf:"db"`
+}
+
+func LoadConfig(provider koanf.Provider, parser koanf.Parser) error {
+	return K.Load(provider, parser)
+}
+
+func Unmarshal(o interface{}) error {
+	return K.Unmarshal("", o)
+}