all: use Go 1.21 for building services

Use a newer supported version.

For golang/go#64169.

Change-Id: Ice8fea55951bf1615a04aca24a870556c281877a
Reviewed-on: https://go-review.googlesource.com/c/build/+/556359
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>

Author: dmitshur

cmd/coordinator/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20-bookworm AS build
+FROM golang:1.21-bookworm AS build
 LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache

cmd/gitmirror/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20-bookworm AS build
+FROM golang:1.21-bookworm AS build
 LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache

cmd/gopherbot/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20 AS build
+FROM golang:1.21-bookworm AS build
 LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache

cmd/pubsubhelper/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20-bookworm AS build
+FROM golang:1.21-bookworm AS build
 LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache

cmd/relui/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20 AS build
+FROM golang:1.21-bookworm AS build
 
 COPY go.mod /app/go.mod
 COPY go.sum /app/go.sum

devapp/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20 AS builder
+FROM golang:1.21-bookworm AS builder
 LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache

maintner/maintnerd/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20 AS build
+FROM golang:1.21-bookworm AS build
 LABEL maintainer="[email protected]"
 
 RUN mkdir /gocache

perf/Dockerfile

@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-FROM golang:1.20-bookworm AS builder
+FROM golang:1.21-bookworm AS builder
 
 COPY go.mod /app/go.mod
 COPY go.sum /app/go.sum