Merge pull request #967 from VazeeKevin/tasks/docker-build-args

stdlib/docker: Add args option to Docker #Build

stdlib/docker/docker.cue

@@ -10,9 +10,14 @@ import (
 #Build: {
 	source: dagger.#Input & {dagger.#Artifact}
 
+	args?: [string]: string
+
 	#up: [
 		op.#DockerBuild & {
 			context: source
+			if args != _|_ {
+				buildArg: args
+			}
 		},
 	]