Dockerfile: use GOTOOLCHAIN=local

This may find its way into the official images, but until it does, let's
make sure we don't get unexpected updates of go.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -11,6 +11,7 @@ ARG BUILDX_VERSION=0.11.2
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
 
 FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS build-base-alpine
+ENV GOTOOLCHAIN=local
 COPY --link --from=xx / /
 RUN apk add --no-cache bash clang lld llvm file git
 WORKDIR /go/src/github.com/docker/cli
@@ -21,6 +22,7 @@ ARG TARGETPLATFORM
 RUN xx-apk add --no-cache musl-dev gcc
 
 FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-bullseye AS build-base-bullseye
+ENV GOTOOLCHAIN=local
 COPY --link --from=xx / /
 RUN apt-get update && apt-get install --no-install-recommends -y bash clang lld llvm file
 WORKDIR /go/src/github.com/docker/cli

dockerfiles/Dockerfile.dev

@@ -7,7 +7,8 @@ ARG BUILDX_VERSION=0.11.2
 FROM docker/buildx-bin:${BUILDX_VERSION} AS buildx
 
 FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS golang
-ENV  CGO_ENABLED=0
+ENV GOTOOLCHAIN=local
+ENV CGO_ENABLED=0
 
 FROM golang AS gofumpt
 ARG GOFUMPT_VERSION=v0.4.0

dockerfiles/Dockerfile.lint

@@ -7,6 +7,7 @@ ARG GOLANGCI_LINT_VERSION=v1.54.2
 FROM golangci/golangci-lint:${GOLANGCI_LINT_VERSION}-alpine AS golangci-lint
 
 FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS lint
+ENV GOTOOLCHAIN=local
 ENV GO111MODULE=off
 ENV CGO_ENABLED=0
 ENV GOGC=75

dockerfiles/Dockerfile.vendor

@@ -5,6 +5,7 @@ ARG ALPINE_VERSION=3.17
 ARG MODOUTDATED_VERSION=v0.8.0
 
 FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS base
+ENV GOTOOLCHAIN=local
 RUN apk add --no-cache bash git rsync
 WORKDIR /src
 

e2e/testdata/Dockerfile.gencerts

@@ -3,6 +3,7 @@
 ARG GO_VERSION=1.20.8
 
 FROM golang:${GO_VERSION}-alpine AS generated
+ENV GOTOOLCHAIN=local
 RUN go install github.com/dmcgowan/quicktls@master
 WORKDIR /tmp/gencerts/notary
 RUN --mount=type=bind,source=e2e/testdata/notary,target=/tmp/gencerts/notary,rw <<EOT