add dockerfile (#397) (#466)

Dockerfile

@@ -0,0 +1,32 @@
+FROM golang:1.13-alpine as builder
+MAINTAINER siddontang
+
+RUN apk add --no-cache \
+    git make wget
+
+RUN wget http://download.pingcap.org/tidb-enterprise-tools-latest-linux-amd64.tar.gz && \
+    tar -xzf tidb-enterprise-tools-latest-linux-amd64.tar.gz && \
+    mv tidb-enterprise-tools-latest-linux-amd64 /opt/tools
+
+RUN mkdir -p /go/src/github.com/pingcap/dm
+WORKDIR /go/src/github.com/pingcap/dm
+
+# Cache dependencies
+COPY go.mod .
+COPY go.sum .
+
+RUN GO111MODULE=on go mod download
+
+COPY . .
+
+RUN make dm-worker dm-master dm-tracer dmctl
+
+FROM alpine:3.10
+
+COPY --from=builder /go/src/github.com/pingcap/dm/bin/dm-worker /dm-worker
+COPY --from=builder /go/src/github.com/pingcap/dm/bin/dm-master /dm-master
+COPY --from=builder /go/src/github.com/pingcap/dm/bin/dm-tracer /dm-tracer
+COPY --from=builder /go/src/github.com/pingcap/dm/bin/dmctl /dmctl
+COPY --from=builder /opt/tools/bin/mydumper /mydumper
+
+EXPOSE 8291 8261 8262