docs(contributing): Adding CONTRIBUTING.md

Author: arthurdenner

CONTRIBUTING.md

@@ -0,0 +1,57 @@
+# Contributing
+
+**Working on your first Pull Request?** You can learn how from this _free_ series [How to Contribute to an Open Source Project on GitHub](https://egghead.io/series/how-to-contribute-to-an-open-source-project-on-github)
+
+## Setting up the project locally
+
+To install the project you need to have `npm` or `yarn` and `node`
+
+1.  [Fork](https://help.github.com/articles/fork-a-repo/) the project, clone your fork:
+
+    ```
+    # Clone your fork
+    git clone https://github.com/<your-username>/react-semantic-ui-datepickers.git
+
+    # Navigate to the newly cloned directory
+    cd react-semantic-ui-datepickers
+    ```
+
+2.  `npm install` or `yarn` to install dependencies
+3.  `npm run storybook` or `yarn storybook` to start Storybook
+
+> Tip: Keep your `master` branch pointing at the original repository and make
+> pull requests from branches on your fork. To do this, run:
+>
+> ```
+> git remote add upstream https://github.com/arthurdenner/react-semantic-ui-datepickers.git
+> git fetch upstream
+> git branch --set-upstream-to=upstream/master master
+> ```
+>
+> This will add the original repository as a "remote" called "upstream,"
+> Then fetch the git information from that remote, then set your local `master`
+> branch to use the upstream master branch whenever you run `git pull`.
+> Then you can make all of your pull request branches based on this `master`
+> branch. Whenever you want to update your version of `master`, do a regular
+> `git pull`.
+
+## Submitting a Pull Request
+
+Please go through existing issues and pull requests to check if somebody else is already working on it, we use `someone working on it` label to mark such issues.
+
+Also, make sure to run the tests before you commit your changes:
+
+`npm run test` or `yarn test`.
+
+## Add yourself as a contributor
+
+This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!
+
+To add yourself to the table of contributors on the `README.md`, please use the
+automated script as part of your PR:
+
+`npm run add-contributor` or `yarn add-contributor`
+
+Follow the prompt and commit `.all-contributorsrc` and `README.md` in the PR.
+
+Thank you for taking the time to contribute! 👍