docs: add harakeishi as a contributor for code

.all-contributorsrc

@@ -0,0 +1,24 @@
+{
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "contributors": [
+    {
+      "login": "harakeishi",
+      "name": "原　慧士",
+      "avatar_url": "https://avatars.githubusercontent.com/u/44335168?v=4",
+      "profile": "https://yaserarenai.com",
+      "contributions": [
+        "code"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7,
+  "projectName": "curver",
+  "projectOwner": "harakeishi",
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "skipCi": true
+}

README.md

@@ -1,10 +1,13 @@
 ![logo](logo.png)
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 [![GitHub release](https://img.shields.io/github/release/harakeishi/curver.svg)](https://github.com/harakeishi/curver/releases) [![Go Report Card](https://goreportcard.com/badge/github.com/harakeishi/curver)](https://goreportcard.com/report/github.com/harakeishi/curver) 
 
 `curver` is a simple way to display the version of a CUI tool made with go.
 `curver` was named as an abbreviation for `current version`.
 
-## Table of Contents
+### Table of Contents
 - [Installation](#installation)
 - [Importing](#importing)
 - [Documentation](#documentation)
@@ -13,27 +16,28 @@
   - [use goreleaser](#use-goreleaser)
   - [If you only want the version](#if-you-only-want-the-version)
 - [License](#license)
+- [Contributors ✨](#contributors-)
 
-# Installation
+## Installation
 ```bash
 go get github.com/harakeishi/curver
 ```
 
-# Importing
+## Importing
 ```go
 import (
     "github.com/harakeishi/curver"
 )
 ```
 
-# Documentation
+## Documentation
 Visit the docs on [GoDoc](https://pkg.go.dev/github.com/harakeishi/curver)
 
-# usage
+## usage
 If the value using ldflag is stored in the variable Version, that value will be displayed.
 Otherwise, it will display the build information embedded in the running binary.
 
-## use go build
+### use go build
 ```go
 // main.go
 package main
@@ -63,7 +67,7 @@ If you want to embed the result of 'git tag', you can do the following
 ```
 $ go build -ldflags "-X github.com/harakeishi/curver.Version=$(git describe --tags)" -o ./main
 ```
-## use goreleaser
+### use goreleaser
 If you are using [goreleaser](https://goreleaser.com/) to do the release, do the following
 
 ```yml
@@ -73,7 +77,7 @@ builds:
 
 ```
 
-## If you only want the version
+### If you only want the version
 The following will return the version as a string.
 
 ```go
@@ -89,6 +93,26 @@ func main () {
 }
 ```
 
-# License
+## License
 Copyright (c) 2022 harakeishi
 Licensed under [MIT](LICENSE)
+
+## Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://yaserarenai.com"><img src="https://avatars.githubusercontent.com/u/44335168?v=4?s=100" width="100px;" alt=""/><br /><sub><b>原　慧士</b></sub></a><br /><a href="https://github.com/harakeishi/curver/commits?author=harakeishi" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!