chore(site): add remote playwright support and script (#10445)

docs/contributing/frontend.md

@@ -217,6 +217,23 @@ to test if the page is being rendered correctly, you should consider using the
 > ℹ️ For scenarios where you need to be authenticated, you can use
 > `test.use({ storageState: getStatePath("authState") })`.
 
+For ease of debugging, it's possible to run a Playwright test in headful mode
+running a Playwright server on your local machine, and executing the test inside
+your workspace.
+
+You can either run `scripts/remote_playwright.sh` from `coder/coder` on your
+local machine, or execute the following command if you don't have the repo
+available:
+
+```bash
+bash <(curl -sSL https://raw.githubusercontent.com/coder/coder/main/scripts/remote_playwright.sh) [workspace]
+```
+
+The `scripts/remote_playwright.sh` script will start a Playwright server on your
+local machine and forward the necessary ports to your workspace. At the end of
+the script, you will land _inside_ your workspace with environment variables set
+so you can simply execute the test (`pnpm run playwright:test`).
+
 ### Integration
 
 Test user interactions like "Click in a button shows a dialog", "Submit the form