chore: Add support for XML decoding in configs.go

configs.go

@@ -2,6 +2,7 @@ package appbase
 
 import (
 	"encoding/json"
+	"encoding/xml"
 	"io"
 	"os"
 	"path/filepath"
@@ -25,10 +26,12 @@ func decodeFile(cfg interface{}, filename string) error {
 		ext = filepath.Ext(filename)
 	)
 	switch ext {
-	case ".yaml":
+	case ".yaml", ".yml":
 		dec = getYAMLDecoder
 	case ".json":
 		dec = getJSONDecoder
+	case ".xml":
+		dec = getXMLDecoder
 	}
 	// Load config
 	cfgFile, err := os.Open(filename)
@@ -67,6 +70,12 @@ func getJSONDecoder(r io.Reader) decoder.Interface {
 	return jsonDecoder
 }
 
+func getXMLDecoder(r io.Reader) decoder.Interface {
+	xmlDecoder := xml.NewDecoder(r)
+	xmlDecoder.Strict = true
+	return xmlDecoder
+}
+
 func getFileNameLocal(filename string) string {
 	fileExt := filepath.Ext(filename)
 	fileNoExt := strings.TrimSuffix(filename, fileExt)