ci: docker build logging

Add the `--progress plain` flag to the docker build so that the output
is easier to read in CI.

.circleci/config.yml

@@ -265,7 +265,7 @@ jobs:
             DOCKER_TAGS=$(echo -ne <<parameters.docker_tags>> | sed "s/,/\n/g" | sed "s/[^a-zA-Z0-9\n]/-/g" | sed -e "s|^|-t ${IMAGE_BASE}:|")
             docker context create buildx-build
             docker buildx create --use buildx-build
-            docker buildx build --platform=<<parameters.platforms>> --target "<<parameters.docker_target>>" --push \
+            docker buildx build --progress plain --platform=<<parameters.platforms>> --target "<<parameters.docker_target>>" --push \
               $(echo -ne $DOCKER_TAGS | tr '\n' ' ') \
               -f <<parameters.docker_file>> \
               <<parameters.docker_context>>