Fix terminal problem in newer buildx

Signed-off-by: Andy Neff <[email protected]>

linux/just_files/just_docker_functions.bsh

@@ -556,7 +556,7 @@ function docker_defaultify()
       # In 0.11 it was docker buildx build --invoke ...\ but I will not be supporting
       # multiple experimental versions.
       BUILDX_EXPERIMENTAL=1 Docker buildx debug --invoke /usr/bin/bash \
-        build ${build_args[@]+"${build_args[@]}"} \
+        build --progress=plain ${build_args[@]+"${build_args[@]}"} \
         -f "${dockerfile}" \
         "." # You can't use JUST_PROJECT_PREFIX+_CWD because of how terra works.