added contributing.md file

Author: Shubham Lakhera

CONTRIBUTING.md

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+# Contributing Guidelines
+
+This documentation contains a set of guidelines to help you during the contribution process.
+We are happy to welcome all the contributions from anyone willing to improve/add new scripts to this project.
+Thank you for helping out and remember, **no contribution is too small.**
+
+
+## Need some help regarding the basics?🤔
+
+
+You can refer to the following articles on basics of Git and Github and also contact the Project Mentors,
+in case you are stuck:
+
+- [Forking a Repo](https://help.github.com/en/github/getting-started-with-github/fork-a-repo)
+- [Cloning a Repo](https://help.github.com/en/desktop/contributing-to-projects/creating-an-issue-or-pull-request)
+- [How to create a Pull Request](https://opensource.com/article/19/7/create-pull-request-github)
+- [Getting started with Git and GitHub](https://towardsdatascience.com/getting-started-with-git-and-github-6fcd0f2d4ac6)
+- [Learn GitHub from Scratch](https://lab.github.com/githubtraining/introduction-to-github)
+
+## Submitting Contributions👩‍💻👨‍💻
+
+Below you will find the process and workflow used to review and merge your changes.
+
+### Step 0 : Find an issue
+
+- Take a look at the Existing Issues or create your **own** Issues!
+- Wait for the Issue to be assigned to you after which you can start working on it.
+- Note : Every change in this project should/must have an associated issue.
+
+![Issue](https://user-images.githubusercontent.com/73248007/135501033-ac37f22d-cd96-4326-bf0b-7d0ed070b697.png)
+
+
+### Step 1 : Fork the Project
+
+- Fork this Repository. This will create a Local Copy of this Repository on your Github Profile.
+Keep a reference to the original project in `upstream` remote.  
+
+```bash
+git clone https://github.com/<your-username>/<repo-name>  
+cd <repo-name>  
+git remote add upstream https://github.com/<upstream-owner>/<repo-name>  
+```  
+![Fork](https://user-images.githubusercontent.com/73248007/135501084-3643da44-118d-4f7a-a8c7-05cef93296b7.png)
+
+
+
+- If you have already forked the project, update your copy before working.
+
+```bash
+git remote update
+git checkout <branch-name>
+git rebase upstream/<branch-name>
+```  
+
+### Step 2 : Branch
+
+Create a new branch. Use its name to identify the issue your addressing.
+
+```bash
+# It will create a new branch with name Branch_Name and switch to that branch 
+git checkout -b branch_name
+```
+
+### Step 3 : Work on the issue assigned
+
+- Work on the issue(s) assigned to you.
+- Add all the files/folders needed.
+- After you've made changes or made your contribution to the project add changes to the branch you've just created by:
+
+```bash  
+# To add all new files to branch Branch_Name  
+git add .  
+# To add only a few files to Branch_Name
+git add <some files>
+```
+
+### Step 4 : Commit
+
+- To commit give a descriptive message for the convenience of reviewer by:
+
+```bash
+# This message get associated with all files you have changed  
+git commit -m "message"  
+```
+
+- **NOTE**: A PR should have only one commit. Multiple commits should be squashed.
+
+### Step 5 : Work Remotely
+
+- Now you are ready to your work to the remote repository.
+- When your work is ready and complies with the project conventions, upload your changes to your fork:
+
+```bash  
+# To push your work to your remote repository
+git push -u origin Branch_Name
+```
+
+- Here is how your branch will look.
+![Branch](https://user-images.githubusercontent.com/73248007/135501103-b446d342-70b3-451e-895e-52345eb7cb0e.png)
+
+
+### Step 6 : Pull Request
+
+- Go to your repository in browser and click on compare and pull requests.
+Then add a title and description to your pull request that explains your contribution.  
+
+![PR](https://user-images.githubusercontent.com/73248007/135501122-6d3bde84-5a50-4baf-8be7-80a4e9f9d51a.png)
+
+- Yay, Your Pull Request has been submitted and will be reviewed by the moderators and merged.
+    
+