Create a teaser video script for Qt Cloud

This should be sent in email to customers.. 

The following 4 topics with 5 seconds each were agreed to be a part of the script: 

• Docker preview (with and without Qtcloud)
• Squish - some test cases running, show execute command, show results in test center
• Support for multiple platform (wasm, android)
• Dashboard plugin items
  • trigger build
  • documentation