env/linux-x86-alpine: update to Alpine 3.16

Also update Go version in buildlet/stage0 to make
build work again.

For golang/go#54306 (but does not fix it).

Change-Id: I7dd656de9cb9f563b816929330fa53059c93b5b8
Reviewed-on: https://go-review.googlesource.com/c/build/+/422097
Run-TryBot: Russ Cox <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Russ Cox <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: rsc

cmd/buildlet/stage0/Dockerfile

@@ -2,11 +2,8 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.13 AS build
-LABEL maintainer "[email protected]"
-
-ENV GO111MODULE=on
-ENV GOPROXY=https://proxy.golang.org
+FROM golang:1.19 AS build
+LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache
 ENV GOCACHE /gocache
@@ -26,6 +23,6 @@ COPY . /go/src/golang.org/x/build/
 RUN go install golang.org/x/build/cmd/buildlet/stage0
 RUN CGO_ENABLED=0 go build -o /go/bin/stage0.static golang.org/x/build/cmd/buildlet/stage0
 
-FROM golang:1.13
+FROM golang:1.19
 COPY --from=build /go/bin/stage0 /go/bin/stage0
 COPY --from=build /go/bin/stage0.static /go/bin/stage0.static

env/linux-x86-alpine/Dockerfile

@@ -8,7 +8,7 @@
 
 FROM golang/buildlet-stage0 AS stage0
 
-FROM alpine:3.10
+FROM alpine:3.16
 MAINTAINER golang-dev <[email protected]>
 
 RUN apk add --no-cache \
@@ -31,7 +31,7 @@ RUN apk add --no-cache \
 
 RUN ssh-keygen -A
 RUN bash -c "(echo ChallengeResponseAuthentication no; echo PasswordAuthentication no; echo PermitRootLogin yes) > /etc/ssh/sshd_config"
-RUN passwd -u root
+RUN bash -c "passwd -u root || true"  # might already be unlocked
 
 COPY --from=stage0 /go/bin/stage0.static /usr/local/bin/stage0