[FLINK-16897] Consolidate docs image files in "fig" folder with license file

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: statefun-2.0.0
• Component/s: Stateful Functions
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 31/Mar/20 19:35
• Updated: 01/Apr/20 03:01
• Resolved: 01/Apr/20 03:01

Description

Because binary image files cannot have a license header, we typically put them into a folder with a "license" file that describes that the images in the folder are licensed to ASF.

To follow that best practice, we should move the images in docs/images to docs/fig, which contains such a file.