[Request]: Add error message for large Dockerfiles while waiting for fix for #735

[katiewasnothere]

Feature or enhancement request details

We have a known issue #735 where Dockerfiles over the size 16kb will fail to build due to "Transport became inactive" or "Stream unexpectedly closed" errors. While we wait for a fix for #735, we could add an error message if a user issues a build command using a dockerfile >= 16kb.

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