Merge pull request #109 from swinslow/add-docs-link

Add badges and documentation links

README.md

@@ -1,5 +1,7 @@
 [![Build Status](https://github.com/spdx/tools-golang/workflows/build/badge.svg)](https://github.com/spdx/tools-golang/actions)
 [![Coverage Status](https://coveralls.io/repos/github/spdx/tools-golang/badge.svg)](https://coveralls.io/github/spdx/tools-golang)
+[![GitHub release](https://img.shields.io/github/release/spdx/tools-golang.svg)](https://github.com/spdx/tools-golang/releases/latest)
+[![Go Reference](https://pkg.go.dev/badge/github.com/spdx/tools-golang.svg)](https://pkg.go.dev/github.com/spdx/tools-golang)
 
 # SPDX tools-golang
 
@@ -53,6 +55,10 @@ tools-golang uses https://github.com/spdx/gordf to manage RDF input and output.
 Other than that, tools-golang does not require anything outside the Go standard
 library.
 
+## Documentation
+
+SPDX tools-golang documentation is available on the pkg.go.dev website at https://pkg.go.dev/github.com/spdx/tools-golang.
+
 ## Contributors
 
 Thank you to all of the contributors to spdx/tools-golang. A full list can be