Merge pull request #3185 from thaJeztah/update_dev_dockerfile

Update contrib/Dockerfile.test

contrib/Dockerfile.test

@@ -6,26 +6,48 @@
 # 3.) $ make binaries install test
 #
 
+ARG GOLANG_VERSION=1.12
+
+FROM golang:${GOLANG_VERSION} AS golang-base
+RUN mkdir -p /go/src/github.com/containerd/containerd
+WORKDIR /go/src/github.com/containerd/containerd
+
 # Install proto3
-FROM golang:1.11 AS proto3
-RUN apt-get update && apt-get install -y autoconf automake g++ libtool unzip
+FROM golang-base AS proto3
+RUN apt-get update && apt-get install -y \
+   autoconf \
+   automake \
+   g++ \
+   libtool \
+   unzip \
+ --no-install-recommends
+
 COPY script/setup/install-protobuf install-protobuf
 RUN ./install-protobuf
 
 # Install runc
-FROM golang:1.11 AS runc
-RUN apt-get update && apt-get install -y curl libseccomp-dev
-COPY vendor.conf /go/src/github.com/containerd/containerd/vendor.conf
+FROM golang-base AS runc
+RUN apt-get update && apt-get install -y \
+    curl \
+    libseccomp-dev \
+  --no-install-recommends
+
+COPY vendor.conf vendor.conf
 COPY script/setup/install-runc install-runc
 RUN ./install-runc
 
-FROM golang:1.11
-RUN apt-get update && apt-get install -y btrfs-tools gcc git libseccomp-dev make xfsprogs
+FROM golang-base AS dev
+RUN apt-get update && apt-get install -y \
+    btrfs-tools \
+    gcc \
+    git \
+    libseccomp-dev \
+    make \
+    xfsprogs \
+  --no-install-recommends
 
-COPY --from=proto3 /usr/local/bin/protoc /usr/local/bin/protoc
+COPY --from=proto3 /usr/local/bin/protoc     /usr/local/bin/protoc
 COPY --from=proto3 /usr/local/include/google /usr/local/include/google
+COPY --from=runc   /usr/local/sbin/runc      /usr/local/go/bin/runc
 
-COPY --from=runc /usr/local/sbin/runc /usr/local/go/bin/runc
-COPY . /go/src/github.com/containerd/containerd
-
-WORKDIR /go/src/github.com/containerd/containerd
+COPY . .