1004 test implementation

Signed-off-by: Guillaume de Rouville <guillaume.derouville@gmail.com>

docs/learn/tests/multibucket/yarn.cue

@@ -0,0 +1,10 @@
+package multibucket
+
+import (
+	"alpha.dagger.io/js/yarn"
+)
+
+// Build the source code using Yarn
+app: yarn.#Package & {
+	source: src
+}