message: docs: Add how to import an exsiting package into CONTRIBUTING.md
diff: @@ -41,3 +41,19 @@ If you'd like to release a new package.
  % yarn initial:release
  ```
  +## Create a new package
  +
  +When you create a new package, you must define the following npm-scripts, otherwise CI would be failed.
  +
  +- `build`
  +- `lint`
  +- `test`
  +- `test:ci`
  +- `prerelease`
  +
  +## Import a package into `kintone/js-sdk`
  +
  +You can import an exsiting package with `lerna import path/to/package`.
  +
  +After the PR has been merged, you have to create a tag at the last commit where the package had been released.
  +The tag format is `package-name@version`
  