travis-ci.org Docker toomanyrequests: You have reached your pull rate limit.

[MaxPeal]

can we enable docker caching or a docker proxy?
or is the switch to travis-ci.com a fix?

from https://travis-ci.org/github/mkaczanowski/packer-builder-arm/builds/773366721

$ set -o errexit; docker run --rm -i ghcr.io/hadolint/hadolint < docker/Dockerfile; docker run --rm -v "$PWD:/mnt" koalaman/shellcheck:stable --enable=all docker/entrypoint.sh; docker build -t packer-builder-arm -f docker/Dockerfile .; docker run --rm --privileged -v /dev:/dev -v ${PWD}:/build packer-builder-arm build boards/raspberry-pi/archlinuxarm.json -extra-system-packages=bmap-tools,zstd; du -h raspberry-pi.img; du -h --apparent-size raspberry-pi.img
Unable to find image 'ghcr.io/hadolint/hadolint:latest' locally
latest: Pulling from hadolint/hadolint
Status: Downloaded newer image for ghcr.io/hadolint/hadolint:latest
Unable to find image 'koalaman/shellcheck:stable' locally
stable: Pulling from koalaman/shellcheck
Status: Downloaded newer image for koalaman/shellcheck:stable
Sending build context to Docker daemon  186.9kB
Step 1/18 : FROM tonistiigi/binfmt:qemu-v6.0.0 AS binfmt
qemu-v6.0.0: Pulling from tonistiigi/binfmt
Status: Downloaded newer image for tonistiigi/binfmt:qemu-v6.0.0
 ---> 8c3670ec3e7d
Step 2/18 : FROM golang:1.16-buster AS builder
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