update readme

README.md

@@ -1 +1,33 @@
-# pakku
+# pakku
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/mycreepy/pakku.svg)](https://pkg.go.dev/github.com/mycreepy/pakku)
+[![Go Report Card](https://goreportcard.com/badge/github.com/mycreepy/pakku?style=flat-square)](https://goreportcard.com/report/github.com/mycreepy/pakku)
+[![Go Build & Test](https://github.com/mycrEEpy/pakku/actions/workflows/build.yml/badge.svg)](https://github.com/mycrEEpy/pakku/actions/workflows/build.yml)
+
+`pakku` is a declarative approach to your system package managers.
+
+## Installation
+
+You can download the pre-built binaries from the GitHub Releases or use various other installation methods.
+
+Using Go:
+
+```shell
+go install github.com/mycreepy/pakku@latest
+```
+
+Using Pkgx:
+
+```shell
+pkgx install github.com/mycreepy/pakku
+```
+
+## Usage
+
+* Initialize a new config:
+  * `pakku init`
+* Add some packages to your config:
+  * `pakku add apt curl`
+  * `pakku add brew awscli`
+* Install the packages on your system:
+  * `pakku apply`