combine system-container files under ./root

images/installer/README_CONTAINER_IMAGE.md

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+ORIGIN-ANSIBLE IMAGE INSTALLER
+===============================
+
+Contains Dockerfile information for building an openshift/origin-ansible image
+based on `centos:7` or `rhel7.3:7.3-released`.
+
+Read additional setup information for this image at: https://hub.docker.com/r/openshift/origin-ansible/
+
+Read additional information about the `openshift/origin-ansible` at: https://github.com/openshift/openshift-ansible/blob/master/README_CONTAINER_IMAGE.md
+
+Also contains necessary components for running the installer using an Atomic System Container.
+
+
+System container installer
+==========================
+
+These files are needed to run the installer using an [Atomic System container](http://www.projectatomic.io/blog/2016/09/intro-to-system-containers/).
+These files can be found under `root/exports`:
+
+* config.json.template - Template of the configuration file used for running containers.
+
+* manifest.json - Used to define various settings for the system container, such as the default values to use for the installation.
+
+* service.template - Template file for the systemd service.
+
+* tmpfiles.template - Template file for systemd-tmpfiles.
+
+These files can be found under `root/usr/local/bin`:
+
+* run-system-container.sh - Entrypoint to the container.
+
+## Options
+
+These options may be set via the ``atomic`` ``--set`` flag. For defaults see ``root/exports/manifest.json``
+
+* OPTS - Additional options to pass to ansible when running the installer
+
+* VAR_LIB_OPENSHIFT_INSTALLER - Full path of the installer code to mount into the container
+
+* VAR_LOG_OPENSHIFT_LOG - Full path of the log file to mount into the container
+
+* PLAYBOOK_FILE - Full path of the playbook inside the container
+
+* HOME_ROOT - Full path on host to mount as the root home directory inside the container (for .ssh/, etc..)
+
+* ANSIBLE_CONFIG - Full path for the ansible configuration file to use inside the container
+
+* INVENTORY_FILE - Full path for the inventory to use from the host