squash all commits

Signed-off-by: Sreeja Saha <sreejasaha.ece2019@nsec.ac.in>

Author: shivaylamba

CONTRIBUTING.md

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+## Contributing Guidelines
+
+Thank you for considering contributing to the repository. This guide details all the general information that one should know before contributing to the project.
+Please stick as close as possible to the guidelines. That way we ensure that you have a smooth experience contributing to this project.
+
+### General Rules :
+These are in general rules that you should be following while contributing to an Open Source project :
+
+- Be Nice, Be Respectful (BNBR)
+- Check if the Issue you created, exists or not.
+- While creating a new issue make sure you describe the issue clearly.
+- Make proper commit messages and document your PR well.
+- Always add Comments in your Code and explain it at points, if possible add Doctest.
+- Always create a Pull Request from a Branch; Never from the Main.
+- Follow proper code conventions because writing clean code is important.

Challenges/challenge_1.md

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+## Welcome to Challenge 1
+
+Welcome to the first challenge! 
+We will start off with an easy task. 
+
+Task: 
+Create a [new issue](https://github.com/scaleracademy/scaler-september-open-source-challenge/issues/new) on this repository with the following details to be added to the content of the issue: 
+
+```
+name: Add your name here
+github_user_name: add your github username here
+```

Challenges/challenge_10.md

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+## Welcome to Challenge 10
+
+Welcome to the 10th challenge! 
+
+Today's challenge is based on the concept of signing your commits. Signing the commits is a way of showing that only authentic commits are being made. 
+
+A lot of open source projects have DCO which stands for [Developer Certification of Origin](https://github.com/apps/dco) including this repository itself and it tries to verify that each commit is signed or not. In case your commit is not signed it will reflect in the pull request that it doesn't pass the DCO test. 
+
+You can read more about how to sign commits [here](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits)
+
+Task: 
+1. Setup the ability to sign commits locally in your systems 
+2. Whenever committing in the future always try to use signed commits 
+3. Make a new signed commit to the pull request that you have made in previous challenges by making this change to the ``yourusername.md`` file: 
+```
+---
+name: your_name
+github_user_name: YOUR-GITHUB-USERNAME
+url_of_github_issue: Link_of_the_github_issue_created_in_first_challenge
+your_favroite_programming_language: Add your favorite programming language here
+---
+```

Challenges/challenge_11.md

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+## Welcome to Challenge 11
+
+Welcome to the 11th challenge! 
+
+Today's challenge is simple.
+
+Task: 
+1. Create another branch from your current branch created in previous challenges (Don't create a new branch from main). 
+2. Share screenshot of this new branch in the issue created in previous challenge

Challenges/challenge_12.md

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+## Welcome to Challenge 12
+
+Welcome to the 12th Challenge 
+
+Today's challenge is a re-practice of the 7th Challenge (https://github.com/scaleracademy/scaler-september-open-source-challenge/blob/main/Challenges/challenge_7.md?plain=1)
+
+So focus for this challenge will be to practice the ``git rebase`` command. We still see a number of Pull requests that have a lot more commits than there should be, therefore we give you a chance to correct it again. 
+
+Ensure to practice the ``git rebase`` command by creating your own local git repository. You can checkout this guide: https://www.freecodecamp.org/news/git-squash-explained/
+
+Task: 
+1. Practice git rebase, and how to squash commit using git rebase in your local projects 
+2. Once done, try to squash the commits in your pull request in the Challenge repository
+3. We also see a lot of challengers are not signing their commits. Refer to Challenge 10: https://github.com/scaleracademy/scaler-september-open-source-challenge/blob/main/Challenges/challenge_10.md and ensure to sign your commits. 

Challenges/challenge_13.md

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+## Welcome to Challenge 13
+
+Welcome to the 13th Challenge 
+
+Today's challenge involves how to use ``git stash`` command effectively. You can refer on how to stash your commits [here](https://git-scm.com/book/en/v2/Git-Tools-Stashing-and-Cleaning)
+
+Task: 
+1. Inside the branch you created in the previous challenge ``your-username-details`` create a new file inside the ``contributors/<YOUR-GITHUB_USERNAME>/`` directory.
+2. Use the git stash command to move these changes to the stash area
+3. Delete the content from the stash area and share a screenshot of this inside the Github issue you created in the first challenge

Challenges/challenge_2.md

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+## Welcome to Challenge 2
+
+Welcome to the second challenge! 
+Today we will focus on how to fork and create a clone of a Github repository
+
+Task: 
+1. Create a fork of this repository 
+2. Clone the forked project locally in your system using the ``git clone`` command 
+3. Add a new comment to the issue you created in the [first task](https://github.com/scaleracademy/scaler-september-open-source-challenge/blob/main/Challenges/challenge_1.md). The comment should have the following: 
+- URL of your forked repository 
+- A screenshot of the cloned project in your system

Challenges/challenge_3.md

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+## Welcome to Challenge 3
+
+Welcome to the third challenge! 
+Today we will focus on how to create a new branch in a git repository
+
+Task: 
+1. Following up on the [previous task](https://github.com/scaleracademy/scaler-september-open-source-challenge/blob/main/Challenges/challenge_2.md), create a new branch locally in your forked clone repository
+2. The branch name should be as follows: ``your_github_username-details``. Example: ``shivaylamba-details``
+3. Add a new comment to the issue you created in the [first task](https://github.com/scaleracademy/scaler-september-open-source-challenge/blob/main/Challenges/challenge_1.md). The comment should have the following:
+- Screenshot showing the list of all the current branches inside of your forked clone repository

Challenges/challenge_4.md

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+## Welcome to Challenge 4
+
+Welcome to the fourth challenge! 
+Today we cover how to Update Fork Repo From the Original Repo
+
+The main repository has been updated since the last fork that all of you created. The goal is to updated the forked repository with the changes made in the original repository. This can be done with the git command of ``git remote add upstream``
+
+Task
+1. Update your forked repository locally with the content of the original repository for both the main branch and the branch that you created in Challenge 3 using the ``git remote add upstream`` command
+2. Once the changes in the forked repository and the original repository are synced in the git branch that you created in the 3rd Challenge, Add a new comment to the issue you created in the [first task](https://github.com/scaleracademy/scaler-september-open-source-challenge/blob/main/Challenges/challenge_1.md). The comment should have the following:
+- Screenshot showing the latest repository contents

Challenges/challenge_5.md

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+## Welcome to Challenge 5
+
+Welcome to the fifth challenge! 
+Today's goal is to update your forked repository and then create a Pull Request
+
+Task
+1. Ensure your forked repository is in sync with the latest changes in the main repository. Also ensure that the git branch that you created in Challenge 2 is also in sync with the latest changes
+2. Create a new folder inside the `contributors` folder, and name it with your github username. It should look something like this `contributors/<YOUR-GITHUB_USERNAME>/`. Ex.
+
+```
+contributors/shivaylamba/
+```
+
+3. Create a markdown file in the folder you created following the naming convention for the file: `<YOUR-GITHUB-USERNAME>.md`. Ex.
+
+```
+contributors/shivaylamba/shivaylamba.md
+```
+
+4. Copy the following template into your file, delete the placeholder text and fill the information with yours.
+
+```
+---
+name: your_name
+github_user_name: YOUR-GITHUB-USERNAME
+---
+```
+5. Submit your Pull Request on the main challenge repo.