Create dockerfile and update makefile to build descheduler container image.

Dockerfile

@@ -0,0 +1,20 @@
+# Copyright 2017 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM fedora
+
+MAINTAINER Avesh Agarwal <avagarwa@redhat.com>
+
+COPY _output/bin/descheduler /bin/descheduler
+CMD ["/bin/descheduler --help"]

Makefile

@@ -12,13 +12,24 @@
 # # See the License for the specific language governing permissions and
 # # limitations under the License.
 
+.PHONY: test
+
+# VERSION is currently based on the last commit
+VERSION:=$(shell git rev-parse --short HEAD)
+
+# IMAGE is the image name of descheduler
+IMAGE:=descheduler:$(VERSION)
+
+all: build
 
 build:
 	go build -o _output/bin/descheduler github.com/kubernetes-incubator/descheduler/cmd/descheduler
 
+image: build
+	docker build -t $(IMAGE) .
+
 clean:
 	rm -rf _output
 
-.PHONY: test
 test:
 	./test/run-unit-tests.sh