Update README.md

Author: youjung-hong

README.md

@@ -10,22 +10,29 @@ devDependencies: {
 }
 ```
 
-## Usage
-Register `TUI_GITHUB_TOKEN` as a environment variables
-
-**Mac OS**
-```sh
-# ~/.bash_profile
-export TUI_GITHUB_TOKEN=github-personal-access-toke
+## Before Use
+1. Check `package.json` has `repository` property
+```json
+// package.json
+"repository": {
+  "type": "git",
+  "url": "https://github.com/username/repository-name.git"
+}
+// or for short expression
+"repository": "https://github.com/username/repository-name.git"
 ```
 
-Execute `tuie` on your `project root`
+2. Register `TUI_GITHUB_TOKEN` as a environment variables
+
+3. Execute `tuie` on your `project root`
 ```json
 // package.json
 scripts: {
     "tuie": "tuie"
 }
 ```
+
+## Usage
 ```bash
 # latest tag
 npm run tuie