add

README.md

@@ -7,9 +7,53 @@
 ## How to use?
 
 ```yml
+name: PR Extract Issues
 
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+
+jobs:
+  extract:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions-cool/pr-extract-issues@v1.0.0
+        with:
+          way: 'commit'
+          issues-lables: 'l1, l2'
+          issues-comment: |
+            HI。这个 issue: ${number} 已经被修复了。
+          issues-close: true
 ```
 
+### Input
+
+| Name | Desc | Type | Required |
+| -- | -- | -- | -- |
+| token | GitHub token | string | ✖ |
+| way | The way to query issues. Options: `title` `body` `commit` | string | ✔ |
+| issues-lables | Extra labels on issues | string | ✖ |
+| issues-comment | Extra comment on issues | string | ✖ |
+| issues-close | Extra close issues | string | ✖ |
+
+- `title`: The PR title. Will only match like
+  - fix: fix other #123 #456 #789
+    - Get: 123 456 789
+  - refctore: use other #222 #333#44
+    - Get：222 33344
+  - So you should start with a space # and end with a space
+- `body`：The PR body
+  - Like: https://github.com/actions-cool/pr-extract-issues/pull/4
+  - Branch whole line display with # start
+- `commit`: Like `title`
+- `issues-lables`: Support multiple, need to be separated by comma
+- `issues-comment`: `${number}` will be replaced with the current issue number
+- `issues-close`: Whether close issue
+
+### Output
+
+- `issues`: Get issues numbers
+
 ## ⚡ Feedback
 
 You are very welcome to try it out and put forward your comments. You can use the following methods: