chore: add --host option to playground:start script in package.json (#2377)

Author: lumirlumir

package.json

@@ -19,8 +19,8 @@
     "lint:css": "stylelint **/src/**/*.css",
     "lint": "eslint .",
     "playground:build": "yarn workspace @docsearch/react-example build",
-    "playground:start": "yarn workspace @docsearch/react-example dev",
-    "playground-js:start": "yarn workspace @docsearch/js-example dev",
+    "playground:start": "yarn workspace @docsearch/react-example dev --host",
+    "playground-js:start": "yarn workspace @docsearch/js-example dev --host",
     "release": "shipjs prepare",
     "start": "yarn run watch",
     "test:size": "bundlesize",