# Support for Extra Services

Symfony Docker is extensible.
When you install a compatible Composer package using Symfony Flex,
the recipe will automatically modify the `Dockerfile` and `compose.yaml` files
to fulfill the requirements of this package.

The currently supported packages are:

- `symfony/orm-pack`: install a PostgreSQL service
- `symfony/mercure-bundle`: use the Mercure.rocks module shipped with Caddy
- `symfony/panther`: install Chromium and its drivers
- `symfony/mailer`: install a Mailpit service
- `blackfireio/blackfire-symfony-meta`: install a Blackfire service

> [!NOTE]
>
> If a recipe modifies the Dockerfile, the container needs to be rebuilt.

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> [!WARNING]
>
> We recommend that you use the `composer require` command inside the container
> in development mode so that recipes can be applied correctly.