automatically run driver setup

Makefile

@@ -1,4 +1,4 @@
-default: env-test
+default: env-test run/driver.run
 	@make -f test.mk OUT=out2
 	@make -f test.mk OUT=out1
 	@printf "Docker Version: %s\n" "$(shell docker --version)"
@@ -54,10 +54,3 @@ run/driver.run: run
 		--node digest-test
 	docker buildx use digest-test
 	touch $@
-
-run/driver.run: run
-	docker buildx create \
-		--name digest-test \
-		--driver docker-container \
-		--node digest-test
-	touch $@