Allow deployments in sub directory

[Nyholm]

Correct me if Im wrong. But I dont think it is possible to use this bridge if you deployed your application in a sub-directory. That is because we give the BrefRuntime the wrong "project_dir".

My serverless.yaml includes the following:

provider:
    name: aws
    environment:
        BREF_AUTOLOAD_PATH: '/var/task/app/vendor/autoload.php'
        BREF_LOOP_MAX: 100
        APP_ENV: prod

I cannot add the LAMBDA_TASK_ROOT environment variable because of AWS does not allow me. I solve this by not relying on that env var to find the project root. Instead I do $options['project_dir'] = dirname(__DIR__, 4); which is very similar to what the default autoload_runtime.php does.

$runtime = $_SERVER['APP_RUNTIME'] ?? $_ENV['APP_RUNTIME'] ?? 'Symfony\\Component\\Runtime\\SymfonyRuntime';
$runtime = new $runtime(($_SERVER['APP_RUNTIME_OPTIONS'] ?? $_ENV['APP_RUNTIME_OPTIONS'] ?? []) + [
  'project_dir' => dirname(__DIR__, 1),
]);

[mnapoli]

LGTM, I can merge on the build is green

[Nyholm]

Thank you for the review. The PR is updated and CI is green

[mnapoli]

🤦 sorry forgot about this one, we'll have another release 😅

[Nyholm]

Thank you for merging