# 0.29.0 Migration Guide

## Changes

- The output of `run:detached` now uses the container name - eg. `node-js-app.run.1` - vs the container id.
- The ID of `cron` tasks is now base36-encoded instead of base64-encoded.
- The `nginx.conf.sigil` is now extracted when source code is extracted for a build and not from the built image. Users can specify alternative paths via the `nginx-conf-sigil-path` property of the `nginx` plugin. See the [nginx documentation](/docs/networking/proxies/nginx.md#customizing-the-nginx-configuration) for more information on how to configure the `nginx.conf.sigil` path for your application.
    - For deploys via `git:from-image`, the `nginx.conf.sigil` file will be extracted from the source image, respecting the value of `nginx-conf-sigil-path`.
- The `Procfile` is now extracted when source code is extracted for a build and not from the built image. Users can specify alternative paths via the `procfile-path` property of the `ps` plugin. See the [process management documentation](/docs/processes/process-management.md#changing-the-procfile-location) for more information on how to configure the `Procfile` path for your application.
    - For deploys via `git:from-image`, the `Procfile` file will be extracted from the source image, respecting the value of `procfile-path`.
- The existing `pre-restore` hook has been renamed to `scheduler-pre-restore`. There is a new `pre-restore` hook that is triggered within the `ps:restore` command prior to restoring any apps.
- Nginx init commands are now performed via systemctl on Ubuntu systems when `/usr/bin/systemctl` is available.

## Removals

- The `DOKKU_WAIT_TO_RETIRE` environment variable has been migrated to a `checks` property named `wait-to-retire` and will be ignored if set as an environment variable.
- The `domains-setup` trigger has been removed. Initial app domains will now be automatically setup during app creation.
- The `URLS` file containing generated urls for an app is no longer generated or referenced. Users should retrieve app urls via the new `domains-urls` plugin trigger.
- The common function `get_app_urls` has been removed. Users should retrieve app urls via the new `domains-urls` plugin trigger.