Create CONTRIBUTION.md

CONTRIBUTION.md

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+
+## Contribution Guidelines🏗
+
+
+
+Want to add your project to the repo? We invite you to contribute. 
+To start contributing, follow the below guidelines: 
+
+**1.**  Fork [this repository.](https://github.com/Design-and-Code/Hacktoberfest-practice) 
+
+**2.**  Clone your forked copy of the project.
+
+```
+git clone https://github.com/<your_user_name>/Projects-showcase.git
+```
+
+**3.** Navigate to the project directory :file_folder: .
+
+```
+cd Projects-showcase
+```
+
+**4.** Add a reference(remote) to the original repository.
+
+```
+git remote add upstream https://github.com/Design-and-Code/Projects-showcase.git
+```
+
+**5.** Check the remotes for this repository.
+
+```
+git remote -v
+```
+
+**6.** Always take a pull from the upstream repository to your master branch to keep it at par with the main project(updated repository).
+
+```
+git pull upstream main
+```
+
+**7.** Create a new branch.
+
+```
+git checkout -b <your_branch_name>
+```
+
+**8.** Perfom your desired changes to the code base.
+
+**9.** Track your changes ✔. 
+
+```
+git add . 
+```
+
+**10.** Commit your changes .
+
+```
+git commit -m "Relevant message"
+```
+
+**11.** Push the committed changes in your feature branch to your remote repo.
+
+```
+git push -u origin <your_branch_name>
+```
+
+**12.** To create a pull request go to your Repo, you will see `compare and pull requests` click on it.
+
+**13.** Add appropriate title and description to your pull request explaining your changes and efforts done.
+
+**14.** Click on `Create Pull Request`.
+
+
+**15** Voila! You have made a PR to the Projects-showcase 💥 . Wait for your submission to be accepted and your PR to be merged.
+
+
+#### Note : 
+> Please do not edit anything above ```<!--START_SECTION-->``` and below ```<!--END_SECTION-->``` in README.MD