docker scan: using an HTTP proxy (#15044)
docker scan: using an HTTP proxy (#15044)

* docker scan: using an HTTP proxy

Explain how to use an HTTP proxy in `docker scan`. It's confusing
because it doesn't use the same settings as the engine, the CLI
or Docker Desktop.

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@docker.com>

* Update engine/scan/index.md

Clarify proxy:port as proxyAddress:port

Co-authored-by: Paweł Gronowski <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@woland.xyz>

* Update engine/scan/index.md

Capitalize PowerShell

Co-authored-by: Paweł Gronowski <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@woland.xyz>

Co-authored-by: Paweł Gronowski <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@woland.xyz>
thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io