buildx/util/progress
Justin Chadwell be6542911f progress: make printer ready only after pausing logrus
This fixes a possible race where messages printed directly after calls
to NewPrinter may appear before the printer starts. With this change, we
delay all of the logs until after.

Signed-off-by: Justin Chadwell <me@jedevc.com>
..
fromreader.go Remove uses of deprecated io/ioutil
multiwriter.go progress: add prefix to vertex progress group
printer.go progress: make printer ready only after pausing logrus
progress.go build: add push support to docker driver
reset.go update lint to go1.16/golangci
writer.go Enable to run build and invoke in background