Integrate with hosted-app-utils

Strip down this repo and allow the hosted-app-utils `package` script to
auto-generate the package.

package

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+LOCATION="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+CONFIG=${CONFIG:-${LOCATION}/config.json}
+COMPOSE=${COMPOSE:-${LOCATION}/docker-compose.yml}
+BUILD_DIR=${BUILD_DIR:-${LOCATION}/build-packages}
+
+${LOCATION}/hosted-app-utils/package ${CONFIG} ${COMPOSE} output=${BUILD_DIR} $@