Add Italian video course about Docker (#5316)

* Add Italian video course about Docker

* Fix typo

* Fix Docker course name

courses/free-courses-it.md

@@ -9,6 +9,7 @@
 * [Database](#database)
   * [SQL](#sql)
 * [Delphi](#delphi)
+* [DevOps](#devops)
 * [Embedded](#embedded)
   * [Arduino](#arduino)
 * [Erlang](#erlang)
@@ -83,6 +84,11 @@
 * [Videocorso Delphi/Lazarus](https://www.youtube.com/watch?v=JxE1nUqriV0&list=PLF75FB30719A09FA2) (F. Camuso)
 
 
+### DevOps
+
+* [Docker - EmmeCiLab](https://www.youtube.com/playlist?list=PLCbSCJEIR6CpDJw4MawjHlgbsP3IG376e) (M. Cicolella)
+
+
 ### Embedded
 
 #### Arduino