Update README badges

Author: muesli

README.md

@@ -1,9 +1,10 @@
 # duf
 
-[![Latest Release](https://img.shields.io/github/release/muesli/duf.svg)](https://github.com/muesli/duf/releases)
-[![Build Status](https://github.com/muesli/duf/workflows/build/badge.svg)](https://github.com/muesli/duf/actions)
-[![Go ReportCard](https://goreportcard.com/badge/muesli/duf)](https://goreportcard.com/report/muesli/duf)
-[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/muesli/duf)
+[![Latest Release](https://img.shields.io/github/release/muesli/duf.svg?style=for-the-badge)](https://github.com/muesli/duf/releases)
+[![Go Doc](https://img.shields.io/badge/godoc-reference-blue.svg?style=for-the-badge)](https://pkg.go.dev/github.com/muesli/duf)
+[![Software License](https://img.shields.io/badge/license-MIT-blue.svg?style=for-the-badge)](/LICENSE)
+[![Build Status](https://img.shields.io/github/workflow/status/muesli/duf/build?style=for-the-badge)](https://github.com/muesli/duf/actions)
+[![Go ReportCard](https://goreportcard.com/badge/github.com/muesli/duf?style=for-the-badge)](https://goreportcard.com/report/muesli/duf)
 
 Disk Usage/Free Utility (Linux, BSD, macOS & Windows)