Create CONTRIBUTING.md

Author: wzhouwzhou

CONTRIBUTING.md

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+### Contribution Guidelines
+When contributing, please be sure to submit new files via a PR instead of editing someone else's. If you would like to request an edit from someone else, please open an issue and tag the contributor (check with git blame).
+
+# One line wonders
+A collection of one-line programs in various languages, performing various tasks.
+**"One-Line"** is for those languages that support it; the aim is to create a runnable file the shortest a language can allow (i.e. no using ; instead of a new line and "minifying" it to be one line).
+
+### Why?
+Have some fun with coding every once in a while, and see how you can abuse the semantics of a language.
+
+### Contributing
+Anyone can contribute to this repo by opening a PR, your contribution will be open-source on Github. Don't know what to make? Try coding something that logs "Hello, world!" to the console!
+
+### Hacktoberfest
+Celebrate [Hacktoberfest](https://hacktoberfest.digitalocean.com/) together with a diverse community of developers from around the world!
+
+PRs marked as spam will not be counted towards 5 PRs in the month of October for your **free Hacktoberfest T-Shirt!**
+
+### Let's Get Started
+1. Fork this repository
+  - Click the Fork button in the top right of this page, then click on your profile image.
+2. Clone to desktop `git clone https://github.com/your-username/one-line-wonders.git`
+3. Checkout a branch `git checkout -b feature/branch-name`
+4. Make yourself known
+  - Add your bio to the CONTRIBUTORS.md file
+
+    Name: [YOUR NAME](Github Link)</br>
+    Place: Where are you from?</br>
+    Coding Experience: Which programming languages do you know? What projects have you/do you worked on?</br>
+    Email: [email protected]</br>
+
+5. Add your one-line program's files. If a folder for your code's language does not exist, feel free to create it.
+6. Commit and push `git add .; git commit -m "commit message"; git push origin branch-name;`
+7. Create a new Pull Request from your fork
+  - Click on the New Pull Request button located near the top of your repository.
+8. Wait for your PR to be reviewed!
+
+**Star this repository if you had fun** :star::tada: