Fix linting issues

internal/pkg/staticfiles/staticfiles.go

@@ -4,14 +4,21 @@ import (
 	"io/ioutil"
 
 	"github.com/hpcng/warewulf/internal/pkg/wwlog"
+	"github.com/pkg/errors"
 )
 
 func WriteData(source string, dest string) error {
 	bytes, err := getResource(source)
+	if err != nil {
+		return errors.Wrap(err, "failed to get resource")
+	}
+
 	err = ioutil.WriteFile(dest, bytes, 0644)
 	if err != nil {
+		// TODO: remove log message if appropriate
 		wwlog.Printf(wwlog.ERROR, "Failed writing %s to: %s\n", dest, err)
-		return err
+		return errors.Wrap(err, "failed to write to file")
 	}
+
 	return nil
 }