Add Dockerfile.

Dockerfile

@@ -0,0 +1,30 @@
+FROM golang:1 AS builder
+
+RUN apt-get update && apt-get install -y upx
+
+ENV PACKAGE=github.com/xperimental/netatmo-exporter
+
+RUN mkdir -p /go/src/${PACKAGE}
+WORKDIR /go/src/${PACKAGE}
+
+ENV LD_FLAGS="-w"
+ENV CGO_ENABLED=0
+
+COPY . /go/src/${PACKAGE}
+RUN echo "-- TEST" \
+ && go test ./... \
+ && echo "-- BUILD" \
+ && go install -tags netgo -ldflags "${LD_FLAGS}" . \
+ && echo "-- PACK" \
+ && upx -9 /go/bin/netatmo-exporter
+
+FROM busybox
+LABEL maintainer="Robert Jacob <xperimental@solidproject.de>"
+
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=builder /go/bin/netatmo-exporter /bin/netatmo-exporter
+
+USER nobody
+EXPOSE 9210
+
+ENTRYPOINT ["/bin/netatmo-exporter"]