docs(intro-js): reference to create-playwright (microsoft#10516)

Author: mxschmitt

docs/src/intro-js.md

@@ -24,6 +24,23 @@ Playwright Test was created specifically to accommodate the needs of the end-to-
 
 Playwright has its own test runner for end-to-end tests, we call it Playwright Test.
 
+### Using init command
+
+The easiest way to get started with Playwright Test is to run the init command.
+
+```bash
+# Run from your project's root directory
+npm init playwright
+# Or create a new project
+npm init playwright new-project
+```
+
+This will create a configuration file, optionally add examples, a GitHub Action workflow and a first test `example.spec.ts`. You can now jump directly to [writing assertions](#writing-assertions) section.
+
+### Manually
+
+Add dependency and install browsers.
+
 ```bash
 npm i -D @playwright/test
 # install supported browsers