Move config into separate package

config/type_url.go

@@ -0,0 +1,45 @@
+package config
+
+import (
+	"fmt"
+	"net/url"
+)
+
+type TypeURL struct {
+	value *url.URL
+}
+
+func (c *TypeURL) UnmarshalText(data []byte) error {
+	if len(data) == 0 {
+		return nil
+	}
+
+	value, err := url.Parse(string(data))
+	if err != nil {
+		return fmt.Errorf("incorrect URL: %w", err)
+	}
+
+	c.value = value
+
+	return nil
+}
+
+func (c *TypeURL) MarshalText() ([]byte, error) { // nolint: unparam
+	return []byte(c.String()), nil
+}
+
+func (c TypeURL) String() string {
+	if c.value == nil {
+		return ""
+	}
+
+	return c.value.String()
+}
+
+func (c TypeURL) Value(defaultValue *url.URL) *url.URL {
+	if c.value == nil {
+		return defaultValue
+	}
+
+	return c.value
+}