fix(envlite): resolve router paths via DOCUMENT_ROOT

The router previously used dirname(__DIR__, 2) . '/src' to locate both
the static-file root and the front controller. That resolves relative
to the router file's own checkout, so invoking envlite from a different
worktree loaded the wrong wp-config.php and triggered a canonical-URL
301 to that wp-config's WP_HOME port.

Use $_SERVER['DOCUMENT_ROOT'] instead — populated by php -S from its
-t flag, which envlite_run_dev_server already points at the target
repo's src/.

Author: sirreal

tools/local-env/router.php

@@ -8,7 +8,11 @@
     return true;
 }
 
-$file = dirname(__DIR__, 2) . '/src' . $path;
+// DOCUMENT_ROOT is the absolute resolution of php -S's -t flag. Using it
+// instead of a path computed from __DIR__ lets the router live outside the
+// target repo (e.g. envlite invoked from a different checkout).
+$docroot = $_SERVER['DOCUMENT_ROOT'];
+$file = $docroot . $path;
 
 if ($path !== '/' && file_exists($file)) {
     if (!is_dir($file)) {
@@ -22,4 +26,4 @@
     }
 }
 
-require dirname(__DIR__, 2) . '/src/index.php';
+require $docroot . '/index.php';