Adopt Getting Started section

Signed-off-by: George Melikov <mail@gmelikov.ru>

docs/Getting Started/Debian/index.rst

@@ -0,0 +1,77 @@
+Debian
+======
+
+`DKMS <https://en.wikipedia.org/wiki/Dynamic_Kernel_Module_Support>`__
+style packages are available from the `Debian GNU/Linux
+repository <https://tracker.debian.org/pkg/zfs-linux>`__ for the
+following configurations. The packages previously hosted at
+archive.zfsonlinux.org will not be updated and are not recommended for
+new installations.
+
+**Debian Releases:** Stretch (oldstable), Buster (stable), and newer
+(testing, sid) **Architectures:** amd64
+
+.. contents:: Table of Contents
+   :local:
+
+Installation
+------------
+
+For Debian Buster, ZFS packages are included in the `contrib
+repository <https://packages.debian.org/source/buster/zfs-linux>`__.
+
+If you want to boot from ZFS, see
+:doc:`Debian Buster Root on ZFS <./Debian Buster Root on ZFS>`
+instead.
+For troubleshooting existing installations on Stretch, see
+:doc:`Debian Stretch Root on ZFS <./Debian Stretch Root on ZFS>`.
+
+The `backports
+repository <https://backports.debian.org/Instructions/>`__ often
+provides newer releases of ZFS. You can use it as follows:
+
+Add the backports repository:
+
+::
+
+   # vi /etc/apt/sources.list.d/buster-backports.list
+   deb http://deb.debian.org/debian buster-backports main contrib
+   deb-src http://deb.debian.org/debian buster-backports main contrib
+
+   # vi /etc/apt/preferences.d/90_zfs
+   Package: libnvpair1linux libuutil1linux libzfs2linux libzpool2linux spl-dkms zfs-dkms zfs-test zfsutils-linux zfsutils-linux-dev zfs-zed
+   Pin: release n=buster-backports
+   Pin-Priority: 990
+
+Update the list of packages:
+
+::
+
+   # apt update
+
+Install the kernel headers and other dependencies:
+
+::
+
+   # apt install --yes dpkg-dev linux-headers-$(uname -r) linux-image-amd64
+
+Install the zfs packages:
+
+::
+
+   # apt-get install zfs-dkms zfsutils-linux
+
+Root on ZFS
+-----------
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   *Root on ZFS
+
+Related topics
+--------------
+.. toctree::
+   :maxdepth: 1
+
+   Debian GNU Linux initrd documentation