Update free-courses-en.md (#6863)

* Update free-courses-en.md

* format: Remove video timing param from ulrs and escape pipes from titles

Addresses #6723

* format: escape markdown tokens from resource title

Co-authored-by: David Ordás <[email protected]>

Author: AgilAghamirzayev

Diff for: courses/free-courses-en.md

@@ -383,6 +383,8 @@
 * [Docker](https://www.youtube.com/playlist?list=PLhW3qG5bs-L99pQsZ74f-LC-tOEsBp2rK) - Raghav Pal
 * [Docker Tutorial for Beginners ](https://www.youtube.com/playlist?list=PL6gx4Cwl9DGBkvpSIgwchk0glHLz7CQ-7) - Thenewboston
 * [Docker Tutorial for Beginners](https://www.youtube.com/watch?v=fqMOX6JJhGo) - FreeCodeCamp
+* [Docker Tutorial for Beginners \[FULL COURSE in 3 Hours\]](https://www.youtube.com/watch?v=3c-iBn73dDE) - TechWorld with Nana
+* [Docker Tutorial for Beginners \| Full Course \[2021\]](https://www.youtube.com/watch?v=p28piYY_wv8) - Amigoscode
 * [Docker Tutorial Videos \| DevOps Tool](https://www.youtube.com/playlist?list=PL9ooVrP1hQOHUKuqGuiWLQoJ-LD25KxI5) - edureka!
 * [IIEC RISE 1.0 Docker](https://www.youtube.com/playlist?list=PLAi9X1uG6jZ30QGz7FZ55A27jPeY8EwkE)