fix terraform

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

terraform/Dockerfile

@@ -1,35 +1,35 @@
-FROM alpine:latest
-LABEL maintainer "Sid Carter <me@sidcarter.com>"
+FROM golang:alpine as builder
+MAINTAINER Jessica Frazelle <jess@linux.com>
 
 ENV PATH /go/bin:/usr/local/go/bin:$PATH
 ENV GOPATH /go
 
-RUN	apk --no-cache add \
-	ca-certificates
+RUN	apk add --no-cache \
+	bash \
+	ca-certificates \
+	git \
+	make \
+	zip
 
 ENV TERRAFORM_VERSION v0.11.7
 
-RUN buildDeps=' \
-		bash \
-		go \
-		git \
-		gcc \
-		g++ \
-		libc-dev \
-		libgcc \
-		make \
-	' \
-	set -x \
-	&& apk --no-cache add --repository https://dl-3.alpinelinux.org/alpine/edge/community $buildDeps \
-	&& mkdir -p /go/src/github.com/hashicorp /etc/terraform.d \
-	&& git clone --depth 1 --branch ${TERRAFORM_VERSION} https://github.com/hashicorp/terraform /go/src/github.com/hashicorp/terraform \
-	&& cd /go/src/github.com/hashicorp/terraform \
-	&& CGO_ENABLED=0 XC_ARCH="amd64" XC_OS="linux" make fmt bin \
-	&& mv bin/terraform /usr/bin/terraform \
-	&& apk del $buildDeps \
-	&& rm -rf /go \
-	&& echo "Build complete."
+RUN go get github.com/hashicorp/terraform
 
+WORKDIR /go/src/github.com/hashicorp/terraform
+
+RUN git checkout "${TERRAFORM_VERSION}"
+
+# Install the vendor packages so stringer works.
+# See: https://github.com/golang/go/issues/10249
+RUN go install ./vendor/...
+
+RUN XC_ARCH="amd64" XC_OS="linux" LD_FLAGS=" -extldflags -static" make bin \
+	&& mv bin/terraform /usr/bin/terraform
+
+FROM scratch
+
+COPY --from=builder /usr/bin/terraform /usr/bin/terraform
+COPY --from=builder /etc/ssl/certs/ /etc/ssl/certs
 
 ENTRYPOINT [ "terraform" ]
 CMD [ "--help" ]