Create README.md

README.md

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+<h1 align='center'>
+  ♫ Chatify ♫ <br/>Chat-based music recommendation tool
+</h1>
+
+<p align='center'>
+  <img alt="GitHub release (latest by date)" src="https://img.shields.io/github/v/release/JunNishimura/Chatify">
+  <img alt="GitHub" src="https://img.shields.io/github/license/JunNishimura/Chatify">
+  <a href="https://goreportcard.com/report/github.com/JunNishimura/Chatify"><img src="https://goreportcard.com/badge/github.com/JunNishimura/Chatify" alt="Go Report Card"></a>
+</p>
+
+## 📖 Overview
+Chatify is a TUI(Terminal User Interface) tool that combines the OpenAI API with the Spotify API, allowing an AI bot to recommend the music you are looking for through conversation. 
+
+## ⚠️ Notice
+Unfortunately, Chatify is currently not free to use; you need to have a Spotify Premium account and pay to use the OpenAI API.
+
+## 👜 Prerequisites
+Chatify requires two things. 
+1. You need to have [a Spotify Premium Account](https://www.spotify.com/premium/) to use Spotify API.
+2. You need to have [a OpenAI account](https://platform.openai.com/login) to use OpenAI API.
+
+## 💻 How to use
+### 1. Install
+#### Homebrew Tap
+```
+brew install JunNishimura/tap/Chatify
+```
+#### Go install
+```
+go install github.com/JunNishimura/Chatify@latest
+```
+
+### 2. Preparation
+Before saying hi to Chatify, please prepare the following three items.
+
+1. Spotify App Client ID
+2. Spotify App Client Secret
+3. OpenAI API key
+
+As for `Spotify App Client ID` and `Spotify App Client Secret`, please create any app from the [Spotify for Developers Dashboard](https://developer.spotify.com/dashboard) and retrieve them from the settings screen.
+
+For `OpenAI API key`, please create an API key from [the OpenAI account screen](https://platform.openai.com/account/api-keys) and obtain it.
+
+### 3. Greetings to Chatify
+You need to provide a couple of information to Chatify at first.
+
+```
+$ chatify greeting
+```
+
+### 3. Talk with Chatify
+Let's talk to Chatify and embark on a journey to discover new music! 
+
+```
+$ chatify hey
+```
+
+## 🪧 License
+Chatify is released under MIT License. See [MIT](https://raw.githubusercontent.com/JunNishimura/Chatify/main/LICENSE)