docs: Document new file sharing method (#1449)

### How do I share files with the host?

  Open 'File Explorer' and click on the 'Network' section, you will see a computer called `host.lan`.

  After installation there will be a folder called `Shared` on your desktop, which can be used to exchange files with the host machine.

  Double-click it and it will show a folder called `Data`, which can be bound to any folder on your host via the compose file:

  To select a folder on the host for this purpose, include the following bind mount in your compose file:

  ```yaml

  volumes:

    -  ./example:/data

    -  ./example:/shared

  ```

  The example folder `./example` will be available as ` \\host.lan\Data`.

> [!TIP]

> You can map this path to a drive letter in Windows, for easier access.

  Replace the example path `./example` with your desired shared folder, which then will become visible as `Shared`.

### How do I change the amount of CPU or RAM?