added download certificate and key in zip format

utils/AddFileToZipWithName.go

@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"archive/zip"
+	"os"
+)
+
+func AddFileToZipWithName(zipWriter *zip.Writer, filePath, fileName string) error {
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return err
+	}
+
+	f, err := zipWriter.Create(fileName)
+	if err != nil {
+		return err
+	}
+
+	_, err = f.Write(data)
+	return err
+}