*: prepare build scripts for a release

scripts/rkt-build

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+mkdir -p _output/bin
+
+sudo rkt run \
+    --volume dex,kind=host,source=$PWD \
+    --mount volume=dex,target=/go/src/github.com/coreos/dex \
+    --dns=8.8.8.8 \
+    --net=host \
+    --insecure-options=image \
+    docker://golang:1.7.1-alpine \
+    --exec=/bin/sh -- -x -c \
+	'apk add --no-cache --update alpine-sdk && go install -v github.com/coreos/dex/cmd/dex && cp /go/bin/dex /go/src/github.com/coreos/dex/_output/bin'