stdlib: tests local docker socket

Signed-off-by: Sam Alba <sam.alba@gmail.com>

stdlib/docker/tests/run-local/local.cue

@@ -1,14 +1,18 @@
 package docker
 
 import (
+	"alpha.dagger.io/dagger"
 	"alpha.dagger.io/random"
 )
 
+dockersocket: dagger.#Stream & dagger.#Input
+
 suffix: random.#String & {
 	seed: ""
 }
 
 run: #Run & {
-	name: "daggerci-test-local-\(suffix.out)"
-	ref:  "hello-world"
+	name:   "daggerci-test-local-\(suffix.out)"
+	ref:    "hello-world"
+	socket: dockersocket
 }