README.md: Migrate from atomic-ws

README.md

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+For some background, see:
+
+ - https://fedoraproject.org/wiki/Workstation/AtomicWorkstation
+ - https://fedoraproject.org/wiki/Changes/WorkstationOstree
+ 
+(Note also this repo obsoletes https://pagure.io/atomic-ws)
+
+High level design
+-----------------
+
+The goal of the system is to be a workstation, using
+rpm-ostree for the base OS, and a combination of
+Docker and Flatpak containers, as well as virtualization
+tools such as Vagrant.
+
+Status
+------
+
+This project is actively maintained and is ready for use
+by sophisticated and interested users, but not ready
+for widespread promotion.
+
+Installing
+----------
+
+Important!  Don't choose auto-partitioning in the below installer ISO.  You
+need to change `/home` to be `/var/home`.  A bit more information in
+this [known issue](https://github.com/rhinstaller/anaconda/issues/800).
+
+There are ISOs available for [Fedora 26)[https://kojipkgs.fedoraproject.org/compose//branched/]
+and (rawhide)[https://kojipkgs.fedoraproject.org/compose//rawhide/].
+
+Important issues:
+-----------------------
+
+ - [Anaconda autopartitoning](https://github.com/rhinstaller/anaconda/issues/800) - be sure to use `/var/home` instead of `/home`
+ - [flatpak system repo](https://github.com/flatpak/flatpak/issues/113#issuecomment-247022006)
+ 
+Migrating between OSTree repos
+-------------------------------------
+
+Enable the 26/27 remotes:
+```
+ostree remote add --if-not-exists --gpg-import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-26-primary fedora-ws-26 https://kojipkgs.fedoraproject.org/compose/ostree/26
+ostree remote add --if-not-exists --gpg-import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-27-primary fedora-ws-27 https://kojipkgs.fedoraproject.org/compose/ostree/rawhide
+```
+Rebase to rawhide:
+```
+rpm-ostree rebase fedora-ws-27:fedora/rawhide/x86_64/workstation
+```
+ 
+Using the system
+--------------------
+
+First, try out `rpm-ostree install` to layer additional packages.  For example,
+`rpm-ostree install powerline`.
+
+Next, let's try flatpak. Before you do: There's a known flatpak issue on
+AtomicWS - run [this workaround](https://github.com/flatpak/flatpak/issues/113#issuecomment-247022006),
+which you only need to do once. After that, [try flatpak](http://flatpak.org/apps.html).
+
+If you are a developer for server applications,
+try [oc cluster up](https://github.com/openshift/origin/blob/master/docs/cluster_up_down.md) to
+create a local OpenShift v3 cluster.
+
+Finally, you'll likely want to make one or more "pet" Docker containers,
+potentially privileged, and use `dnf/yum` inside these. You can use e.g. `-v
+/srv:/srv` so these containers can share content with your host (such as git
+repositories). Note that if you want to share content between multiple Docker
+containers and the host (e.g. your desktop session), you should execute (once):
+
+```
+sudo chcon -R -h -t container_file_t /var/srv
+```
+
+Future work
+-----------
+
+ - GNOME Software support for both rpm-ostree/flatpak and possibly docker
+ - automated tests that run on this content