Add scripts to release from travis-ci

.travis/ingress-controller.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+# 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.
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+source $DIR/common.sh
+
+IMAGE=$(make -s -C $DIR/../ image-info)
+
+if docker_tag_exists "aledbf/nginx-ingress-controller" $(echo $IMAGE | jq .tag); then
+    echo "Image already published"
+    exit 0
+fi
+
+echo "building aledbf/nginx-ingress-controller image..."
+make -C $DIR/../ release