Dockerfile.simple: simplify by using golang img
Instead of installing golang from sources, it's easier to use
golang image which is based on Debian Stretch.
# This represents the bare minimum required to build and test Docker.
-FROM debian:stretch
+FROM golang:1.10.4-stretch
# allow replacing httpredir or deb mirror
ARG APT_MIRROR=deb.debian.org
@@ -37,18 +37,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
vim-common \
&& rm -rf /var/lib/apt/lists/*
-# Install Go
-# IMPORTANT: If the version of Go is updated, the Windows to Linux CI machines
-# will need updating, to avoid errors. Ping #docker-maintainers on IRC
-# with a heads-up.
-# IMPORTANT: When updating this please note that stdlib archive/tar pkg is vendored
-ENV GO_VERSION 1.10.4
-RUN curl -fsSL "https://golang.org/dl/go${GO_VERSION}.linux-amd64.tar.gz" \
- | tar -xzC /usr/local
-ENV PATH /go/bin:/usr/local/go/bin:$PATH
-ENV GOPATH /go
-ENV CGO_LDFLAGS -L/lib
-
# Install runc, containerd, tini and docker-proxy
# Please edit hack/dockerfile/install/<name>.installer to update them.
COPY hack/dockerfile/install hack/dockerfile/install
