Added Web3 Content (#7186)

* Update free-programming-cheatsheets.md

Update broken link from Docker Section.

* Adding Web3 Content

* Adding Web3 Content

* Update Web3 Content

* Update Web3 Content

* Update Web3 Content

* Update Web3 Content

* use titles as it is and then alphabetize

* use crosslinks to reference base sections: BlockChain & Solidity

* Update courses/free-courses-en.md

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: Eric Hellman <eric@hellman.net>

courses/free-courses-en.md

@@ -101,6 +101,7 @@
     * [Deno](#deno)
 * [Verilog / VHDL / SystemVerilog](#verilog--vhdl--systemverilog)
 * [Web Development](#web-development)
+* [Web3](#web3)
 * [Windows Phone](#windows-phone)
 * [YAML](#yaml)
 
@@ -117,6 +118,7 @@
 * [FutureLearn](https://www.futurelearn.com)
 * [IITBombayX (IITBX)](https://www.iitbombayx.in)
 * [Khan Academy](https://www.khanacademy.org)
+* [LearnWeb3 DAO \| Become a Web3 Developer for Free](https://learnweb3.io)
 * [MIT OCW](http://ocw.mit.edu)
 * [MOOC.fi](https://www.mooc.fi/en/)
 * [NPTEL](https://onlinecourses.nptel.ac.in)
@@ -1406,6 +1408,13 @@
 * [Web Programming](https://open.cs.uwaterloo.ca/web-programming/) - Centre for Education in Math and Computing (University of Waterloo)
 
 
+### Web3
+
+> :information_source: See also … [Blockchain](#blockchain), [Solidity](#solidity)
+
+* [Learn Blockchain, Solidity, and Full Stack Web3 Development with JavaScript – 32-Hour Course](https://www.youtube.com/watch?v=gyMwXuJrbJQ) - Patrick Collins (freeCodeCamp)
+
+
 ### Windows Phone
 
 * [Windows Phone 8.1 Development for Absolute Beginners](https://web.archive.org/web/20150213035325/http://channel9.msdn.com/Series/Windows-Phone-8-1-Development-for-Absolute-Beginners) - Bob Tabor, Matthias Shapiro, Larry Lieberman *(:card_file_box: archived)*