stdlib: os package

Signed-off-by: Solomon Hykes <solomon@dagger.io>

tests/stdlib/js/react/react.cue

@@ -4,7 +4,7 @@ import (
 	"dagger.io/dagger"
 	"dagger.io/js/react"
 	"dagger.io/alpine"
-	"dagger.io/docker"
+	"dagger.io/os"
 )
 
 TestData: dagger.#Artifact
@@ -14,26 +14,13 @@ TestReact: {
 		source: TestData
 	}
 
-	test: docker.#Container & {
+	test: os.#Container & {
 		image: alpine.#Image & {
 			package: bash: "=5.1.0-r0"
 		}
-		volume: build: {
-			from: app.build
-			dest: "/build"
-		}
+		mount: "/build": from: app.build
 		command: """
 			test "$(cat /build/test)" = "output"
 			"""
-		shell: {
-			path: "/bin/bash"
-			args: [
-				"--noprofile",
-				"--norc",
-				"-eo",
-				"pipefail",
-				"-c",
-			]
-		}
 	}
 }