Launch: Add urlFilter to the attach-chrome config

Fix attaching to an already executing Chrome instance with at least one
(or the) tab opened with localhost:3000 (and all of its underlying
resources). Allows attaching without having to browse localhost:3000 in
a separate or new (single-tab) Chrome window, albeit this still working.

Signed-off-by: Marco Miller <marco.miller@ericsson.com>

.vscode/launch.json

@@ -20,7 +20,8 @@
             "name": "Attach to Chrome",
             "port": 9222,
             "sourceMaps": true,
-            "webRoot": "${workspaceRoot}/examples/browser"
+            "webRoot": "${workspaceRoot}/examples/browser",
+            "urlFilter": "http://localhost:3000/*"
         },
         {
             "type": "firefox",