add motivation and enhance installation

Author: wreulicke

README.md

@@ -2,9 +2,33 @@
 
 This is patch tool using comment directive.
 
+## Motivation
+
+This aims to make scaffolding more easily and safely.
+
+Sometimes we can see some templates that don't work after generating from them.
+We should build and test those templates on CI pipelines, but, it is hard to test templates correctness because templates usually does'nt work before generation.
+So, this `patchr` aims to create a `living` scaffolding template.
+
 ## Installation
 
-```
+Download from [Releases](https://github.com/wreulicke/patchr/releases)
+
+```bash
+# Mac
+curl -o patchr -sL "https://github.com/wreulicke/patchr/releases/download/v0.0.1/patchr_0.0.1_darwin_arm64"
+curl -o patchr -sL "https://github.com/wreulicke/patchr/releases/download/v0.0.1/patchr_0.0.1_darwin_amd64"
+
+# Linux
+curl -o patchr -sL "https://github.com/wreulicke/patchr/releases/download/v0.0.1/patchr_0.0.1_linux_amd64"
+curl -o patchr -sL "https://github.com/wreulicke/patchr/releases/download/v0.0.1/patchr_0.0.1_linux_arm64"
+
+# Windows
+curl -o patchr -sL https://github.com/wreulicke/patchr/releases/download/v0.0.1/patchr_0.0.1_windows_amd64.exe
+curl -o patchr -sL https://github.com/wreulicke/patchr/releases/download/v0.0.1/patchr_0.0.1_windows_arm64.exe
+
+chmod +x patchr
+mv patchr /usr/local/bin
 ```
 
 ## Usage