Replace docker scan with Docker Scout

[ajeetraina]

As docker scan command is no longer available, it would be great to replace https://github.com/docker/getting-started/blob/master/docs/tutorial/image-building-best-practices/index.md with docker scout.

[cwild95]

bump. Just came across this issue today working through the tutorial.

PS C:\Projects\Docker\app> docker scan getting-started
The docker scan command has been removed.

[juni0r]

Same here. The new command would probably be

docker scout quickview getting-started

or

docker scout cves getting-started

for a detailed view.