feat: add online doc (#13)

* feat: add online site

* add

docs/changelog.en-US.md

@@ -0,0 +1,40 @@
+---
+toc: menu
+---
+
+# ✨ Changelog
+
+- Version rules
+  - Use two-level semantic version, such as v1, v1.1, v2, v2.1
+  - v1 represents the initial version
+  - The fixes and additions to the v1 version will be released to the v1.1 version
+  - When the released v1.x runs stable for a certain period of time, release the advanced v2 version
+  - It is recommended to use the largest version and above for the parameters in the API
+
+- Version selection
+  - It is recommended to use the latest releases version. It can be seen in [releases](https://github.com/actions-cool/issues-helper/releases)
+  - You can also refer to the update log below to select the version
+  - It also supports the direct use of branch versions. Such as:
+
+```yml
+- name: Issues Helper
+  uses: actions-cool/issues-helper@main
+```
+
+## v1.2
+
+`2020.12.25`
+
+- feat: add check-issue & remove labels. [#12](https://github.com/actions-cool/issues-helper/pull/12)
+
+## v1.1
+
+`2020.12.24`
+
+- fix: yml not support array. [#11](https://github.com/actions-cool/issues-helper/pull/11)
+
+## v1
+
+`2020.12.23`
+
+🎉 First release.