Merge branch 'scaleracademy:main' into cy2000yadav-details

Challenges/challenge_20.md

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+## Welcome to Challenge 20
+
+Welcome to the 20th Challenge 
+
+Today you will learn about project boards on GitHub
+
+### What are Github Project Boards?
+
+GitHub project boards helps you keep track of stuffs you're actively working on within your repository. You can say it's a project managemnet tool, or even a collaboration tool for teams. You create a project board with columns for your TODO or backlogs or even bugs, In progress activies and lastly a column for your finished tasks. You can sort of see it as a SCRUM board. To learn more [about project boards go through this link](https://help.github.com/en/github/managing-your-work-on-github/about-project-boards)
+
+## Tasks
+
+- Create a GitHub repository for any project you can think up
+- On a sheet of paper create a TODO list (or backlog) of features you want to have in you app
+- Create a project board with a `TODO` column, `In progress`, `Done`
+- Create a card for all the items you already wrote on the sheet of paper in the TODO column
+- Work on the features synchronously and move the card respectively for each in progress task to the `In progress` column
+- When you're done with the `In progress` task move the card to the `Done` column
+
+## How to submit your entry
+
+- Take a screenshot of your project board for when you moved an card from `In progress` to `Done`
+- Add you screenshot to the Github issue created in the previous challenges 

Challenges/challenge_21.md

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+## Welcome to Challenge 21
+
+Welcome to the 21st Challenge 
+
+Today we will be learning about Git Aliases! :). This is an amazing feature that helps us use less keystroke
+
+ The term alias is synonymous with a shortcut. Alias creation is a common pattern found in other popular utilities like `bash` shell. Aliases are used to create shorter commands that map to longer commands. Aliases enable more efficient workflows by requiring fewer keystrokes to execute a command. To learn more;
+
+ - [Git Alias](https://www.atlassian.com/git/tutorials/git-alias)
+
+  ## Tasks
+
+ - Go through the Git Alias documentation shared here
+ - Create at least 2 alias for any git commands you feel is too long
+ - Take a screenshot of the alias you created. hint run `git config --get-regexp alias`
+ - Take a screenshot of using your alias
+ - Post these screenshot in the issue created in the prior challenges