Update faqs-app-service-linux.yml

[btardif]

We don't support private registries over HTTP

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[btardif]

@genlin

For LWASv1 / docker pull to support this, the registry needs to be added as an "insecure registry" on docker startup (dockerd | Docker Docs), which is something we only do for Internal Registry Roles where enabled.

For LWASv2 image pull to support this, a specific flag needs to be present (something akin to --plain-http=true), and this is again something that is only present when we pull platform images from the Internal Registry Roles.

I don't believe HTTP pull for private registries has ever been a supported scenario.

[stevenernst131]

@btardif hold up this might not even be correct to begin with, let me follow up with you offline.