Fix lesson template

curriculum/03-git-basics/01-introduction-to-git.md

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 # Introduction to Git
-## Work in progress
+## Introduction
+First let's make things clear, **Git** and **Github** are two completly separate systems. We usually use both together and in this lesson we will talk about what is **Git** and what is **Github**. I the next lesson we will connect those two together and in the last lesson of the chapter, we will learn the basics of using **Git**.
+## What is Git?
+You can think of `git` as a really awesome save button, but instead of saving files like code editor does (one copy at a time), `git` tracks diffrences between the files. This allows us to version control our programs, revert back in time when we brake something and have a clean history of how the project evolved. Knowing how to use `git` is another essential skill to have as a developer.
+
+Git is local only software (program) that enables all of these cool features. It runs completly offline and does not contact any servers by default.
+## What is Github?
+Github is an online platform that enables hosting our `git`-s to remote servers, collaborate more easily with fellow developers and ultimately be your own porfolio.
+
+Github is under Microsoft domain which some developers don't like, so there are more alternatives like *gitlab*, *bitbucket*, etc ... For the purpose of this course we will be using Github.
+

templates/lesson-template.md

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-id: core-datatypes
+id: 
 title: 
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