[contrib] bump golang
Use golang:1.9, which should get the latest 1.9.x version,
instead of using a specific tag.
#
# Install proto3
-FROM golang:1.9.3 AS proto3
+FROM golang:1.9 AS proto3
RUN apt-get update && apt-get install -y autoconf automake g++ libtool unzip
COPY script/setup/install-protobuf install-protobuf
RUN ./install-protobuf
# Install runc
-FROM golang:1.9.3 AS runc
+FROM golang:1.9 AS runc
RUN apt-get update && apt-get install -y curl libapparmor-dev libseccomp-dev
COPY vendor.conf /go/src/github.com/containerd/containerd/vendor.conf
COPY script/setup/install-runc install-runc
RUN ./install-runc
-FROM golang:1.9.3
+FROM golang:1.9
RUN apt-get update && apt-get install -y btrfs-tools gcc git libapparmor-dev libseccomp-dev make xfsprogs
COPY --from=proto3 /usr/local/bin/protoc /usr/local/bin/protoc
