add install instructions

Author: d-rk

Makefile

@@ -39,7 +39,8 @@ clean:
 .PHONY: release
 release:
 	eval "sed -i 's/version:.*/version: \"$$version\"/g' plugin.yaml"
-	git add "plugin.yaml"
+	eval "sed -i 's/version=.*/version=$$version/g' README.md"
+	git add plugin.yaml README.md
 	git commit -m "releases $(version)"
 	git tag -a $(version) -m "release $(version)"
 	git push origin

README.md

@@ -1,4 +1,17 @@
 # helm-doc
 a helm plugin for documentation generation
 
-[![Build Status](https://travis-ci.com/random-dwi/helm-doc.svg?branch=master)](https://travis-ci.com/random-dwi/helm-doc)
+[![Build Status](https://travis-ci.com/random-dwi/helm-doc.svg?branch=master)](https://travis-ci.com/random-dwi/helm-doc)
+
+## installation
+
+choose the variant needed and install with the following:
+
+```bash
+version=0.1.0
+#variant=Linux_x86_64
+#variant=Linux_i386
+#variant=Darwin_x86_64
+#variant=Darwin_i386
+helm plugin install https://github.com/random-dwi/helm-doc/releases/download/${version}/helm-doc_${version}_${variant}.tar.gz
+```