versions: Add versions database

Add a YAML format database that is the equivalent of the Clear
Containers `versions.txt` file [1].

The file defines the versions of important non-golang dependencies used
by this and other Kata repositories particularly for testing and packaging.

Defining all version details centrally in this file avoids duplication
and "bitrot" when versions need to be changed.

[1] - https://github.com/clearcontainers/runtime/blob/master/versions.txt

Fixes #11.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>

versions.yaml

@@ -0,0 +1,84 @@
+#
+# Copyright (c) 2018 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+---
+description: |
+  This file contains version details that are used by various
+  repositories for setting up the correct environment to run
+  tests and package components.
+
+  Notes:
+
+  - All sections *MUST* include a URL where applicable.
+
+  - All sections *SHOULD* include a description where intent is
+    not clear.
+
+  - WARNING: Gotcha alert! Remember to double-quote *all*
+    strings! This avoids the possibility of a version
+    containing a period being treated as a floating point number
+    (and truncated!)
+
+golang:
+  versions:
+    minimum: "1.8.3"
+    version: "1.10"
+
+specs:
+  oci:
+    url: "https://github.com/opencontainers/runtime-spec/releases"
+    version: "v1.0.0-rc5"
+
+components:
+  agent:
+    url: "https://github.com/kata-containers/agent"
+    commit: "6f6e9ecd8aded0783c31968b304a9d6589114363"
+
+assets:
+  image:
+    url: "https://github.com/kata-containers/osbuilder"
+    type: "clearlinux"
+    release: "20640"
+
+  kernel:
+    url: "https://github.com/kata-containers/linux"
+    version: "v4.14.22-86.container"
+    release: "19790"
+
+  hypervisor:
+    qemu:
+      url: "https://github.com/kata-containers/qemu"
+      version: "741f430a960b5b67745670e8270db91aeb083c5f-29"
+      release: "19360"
+
+externals:
+  description: "Third-party projects used by Kata"
+
+  crio:
+    url: "https://github.com/kubernetes-incubator/cri-o"
+    version: "v1.9.10"
+
+  docker:
+    url: "https://github.com/moby/moby"
+    version: "v17.12-ce"
+    swarm:
+      version: "1.12.1"
+
+  kubernetes:
+    url: "https://github.com/kubernetes/kubernetes"
+    version: "1.9.3-00"
+
+  openshift:
+    origin:
+      url: "https://github.com/openshift/origin"
+      version: "v3.7.1"
+      commit: "ab0f056"
+
+  runc:
+    url: "https://github.com/opencontainers/runc"
+    version: "v1.0.0-rc5"
+
+# vim:ts=2:expandtab:tw=70