Images: Bump Alpine to v3.23.0.

[Gacko]

/triage accepted
/kind cleanup
/priority backlog
/cc @cpanato @strongjz @tao12345666333

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[Copilot]

Pull request overview

This pull request bumps the Alpine Linux base image version from 3.22.2 to 3.23.0 across all Dockerfiles and configuration files in the ingress-nginx project. This is a routine maintenance update to keep the base images current with the latest stable Alpine release.

• Updated all direct Alpine image references from alpine:3.22.2 to alpine:3.23.0
• Updated all Golang Alpine variant references from alpine3.22 to alpine3.23
• Updated example/documentation files to reflect the new version

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/e2e-image/Dockerfile	Updated base Alpine image to 3.23.0 for E2E test image
rootfs/Dockerfile-chroot	Updated base Alpine image to 3.23.0 for chroot environment
images/test-runner/rootfs/Dockerfile	Updated Golang Alpine variant to alpine3.23
images/nginx/rootfs/Dockerfile	Updated both builder and runtime Alpine images to 3.23.0
images/go-grpc-greeter-server/rootfs/Dockerfile	Updated Golang Alpine variant to alpine3.23 for build stage
images/fastcgi-helloserver/rootfs/Dockerfile	Updated Golang Alpine variant to alpine3.23 for builder
images/ext-auth-example-authsvc/rootfs/Dockerfile	Updated Golang Alpine variant to alpine3.23 for builder
images/custom-error-pages/rootfs/Dockerfile	Updated Golang Alpine variant to alpine3.23 for builder
images/cfssl/rootfs/Dockerfile	Updated base Alpine image to 3.23.0
docs/examples/customization/sysctl/patch.json	Updated Alpine image reference in example configuration to 3.23.0
Makefile	Updated E2E_IMAGE Golang Alpine variant to alpine3.23

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[Gacko]

Requires this to be merged first, since there is no Go v1.25.4 image based on Alpine v3.23.0, but only a Go v1.25.5 one.

[Gacko]

@cpanato: I had to update OpenTelemetry to make the NGINX base image build work. See this diff: https://github.com/kubernetes/ingress-nginx/compare/87975d2858cfe27eeef393051781b54ed4d2f759..5a2160432c0987a70b7c697f4642327b7f15c8c2.

Since you already LGTM'd this, I'm gonna self-LGTM / force-merge once CI succeeds. Just so you know! 🙂

[cpanato]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, Gacko

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[k8s-ci-robot]

New changes are detected. LGTM label has been removed.