[DOCS] #1241 Details on a solution for apparmour in ubuntu 24.04 (PR #1242)

  --enable-features=RendererAppContainer

  --enable-features=RendererAppContainer

```

```

### Making Cromite work in Ubuntu 24.04 and its derivatives (kubuntu, etc)

This happens because, starting with Ubuntu 24.04, Apparmor

restricts the use of unprivileged user namespaces. To fix this, you have several options:

#### 1. Creating an apparmor profile for cromite

Create `/etc/apparmor.d/chrome`, and write:

```

abi <abi/4.0>,

include <tunables/global>

profile cromite /home/user/cromite/chrome-lin/chrome flags=(unconfined) {

  userns,

  include if exists <local/chrome>

}

```

replacing the cromite binary path with where you have placed cromite.

Now, run `sudo apparmor_parser -r /etc/apparmor.d/cromite` to apply the changes.

#### 2. Disabling the restriction until next reboot

`sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0`

#### 3. Disabling the restriction permanently

Add `kernel.apparmor_restrict_unprivileged_userns=0` to the file `/etc/sysctl.d/60-apparmor-namespace.conf`.  Create the file if not exists.

### Auto-update setup for linux

### Auto-update setup for linux

working in progress in https://github.com/uazo/cromite/issues/771

working in progress in https://github.com/uazo/cromite/issues/771