test: add test data

Author: AriPerkkio

test/fixtures/mount-example/image.png

@@ -7,7 +7,7 @@ test("user can mount directories from file-system to webcontainer", async ({
   await webcontainer.mount("test/fixtures/mount-example");
 
   const ls = await webcontainer.runCommand("ls");
-  expect(ls).toMatchInlineSnapshot(`"file-1.ts nested"`);
+  expect(ls).toMatchInlineSnapshot(`"file-1.ts image.png nested"`);
 
   const lsNested = await webcontainer.runCommand("ls", ["nested"]);
   expect(lsNested).toMatchInlineSnapshot(`"file-2.ts"`);