update 📝: introduction part is almost done

docs/intro.mdx

@@ -1,10 +1,16 @@
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 sidebar_position: 1
-description: Get started with Docusaurus in less than 50 minutes.
+description: Introduction to C++. Introduction to 30 Days of CPP. This tutorial will give you a good introduction to the C++ programming language. This tutorial series is best for beginners to start with C++ programming.
 sidebar_label: Introduction
 title: Introduction
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-# description
+# Introduction to 30 Days of CPP
 
-Hello Guy
+Congratulations on deciding to participate in 30 days of CPP programming challenge. In this challenge you will learn everything you need to be a CPP programmer, and in general, the whole concept of programming. In the end of the challenge you will get a 30DaysOfCPP programming challenge completion certificate. In case you need help or if you would like to help others you may join the telegram group.
+
+A 30DaysOfCPP challenge is a guide for both beginners and advanced CPP developers. Welcome to CPP. CPP is the language of the web. I enjoy using and teaching CPP and I hope you will do so too.
+
+![30-days-of-cpp-day-01](../static/img/30-days-cpp-banner.png)
+
+In this step by step CPP challenge, you will learn CPP, the most popular programming language in the history of mankind. CPP is used to add interactivity to websites, to develop mobile apps, desktop applications, games and nowadays CPP can be used for machine learning and AI. CPP (JS) has increased in popularity in recent years and has been the leading programming language for six consecutive years and is the most used programming language on Github.