add Dockerfile

Dockerfile.build

@@ -0,0 +1,27 @@
+# oscalkit - OSCAL conversion utility
+# Written in 2017 by Andrew Weiss <andrew.weiss@docker.com>
+
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain worldwide.
+# This software is distributed without any warranty.
+
+# You should have received a copy of the CC0 Public Domain Dedication along with this software.
+# If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+FROM golang:1.11 AS race-detector
+WORKDIR /go/src/github.com/opencontrol/oscalkit
+COPY . .
+WORKDIR /go/src/github.com/opencontrol/oscalkit/cli
+RUN go build -race
+
+FROM golang:1.11
+ARG GOOS
+ARG GOARCH
+ARG VERSION
+ARG BUILD
+ARG DATE
+ARG BINARY
+WORKDIR /go/src/github.com/opencontrol/oscalkit
+COPY --from=race-detector /go/src/github.com/opencontrol/oscalkit .
+WORKDIR /go/src/github.com/opencontrol/oscalkit/cli
+RUN CGO_ENABLED=0 GOOS=${GOOS} GOARCH=${GOARCH} go build -o /${BINARY} -v -ldflags "-s -w -X github.com/opencontrol/oscalkit/cli/version.Version=${VERSION} -X github.com/opencontrol/oscalkit/cli/version.Build=${BUILD} -X github.com/opencontrol/oscalkit/cli/version.Date=${DATE}"