Add sync command

app/utils.go

@@ -0,0 +1,25 @@
+package app
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"strings"
+)
+
+func getFileContent(pathToFile string) ([]byte, error) {
+	return ioutil.ReadFile(pathToFile)
+}
+
+func getFileExcension(pathToFile string) (string, error) {
+	splittedFileName := strings.Split(pathToFile, ".")
+
+	if len(splittedFileName) == 1 {
+		msg := fmt.Sprintf("excension for file \"%v\", not found", splittedFileName)
+		return "", errors.New(msg)
+	}
+
+	fileExcension := splittedFileName[len(splittedFileName)-1]
+
+	return fileExcension, nil
+}