How to contribution. Fixed zhongsp#189.

zhongsp · zhongsp · commit e7630fc066e3 · 2018-07-05T13:37:23.000+08:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -0,0 +1,28 @@
+# How to contribute
+
+First, thanks for contribution!
+
+## Fix typos
+
+Submit pull requests to fix them.
+
+## Fix bad translation
+
+Submit pull requests to fix them.
+
+## Add new translations
+
+You could select one from [Help wanted issues](https://github.com/zhongsp/TypeScript/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22).
+Leave a comment for translating to avoid duplicate work.
+
+Or, you could add any topic related to TypeScript.
+
+Submit pull requests.
+
+## Lint your markdown content
+
+```sh
+npm install && npm test
+```
+
+Fix lint errors, then commit and push.
