chore (deps): bump the docker-dependencies group with 2 updates

Bumps the docker-dependencies group with 2 updates: node and nginxinc/nginx-unprivileged.


Updates `node` from 24-alpine to 26-alpine

Updates `nginxinc/nginx-unprivileged` from `458ecbe` to `fd3314e`

---
updated-dependencies:
- dependency-name: node
  dependency-version: 26-alpine
  dependency-type: direct:production
  dependency-group: docker-dependencies
- dependency-name: nginxinc/nginx-unprivileged
  dependency-version: stable-alpine
  dependency-type: direct:production
  dependency-group: docker-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -4,7 +4,7 @@
 # Modifier --platform=$BUILDPLATFORM limits the platform to "BUILDPLATFORM" during buildx multi-platform builds
 # This is because npm "chromedriver" package is not compatiable with all platforms
 # For more info see: https://docs.docker.com/build/building/multi-platform/#cross-compilation
-FROM --platform=$BUILDPLATFORM node:24-alpine@sha256:a0b9bf06e4e6193cf7a0f58816cc935ff8c2a908f81e6f1a95432d679c54fbfd AS builder
+FROM --platform=$BUILDPLATFORM node:26-alpine@sha256:725aeba2364a9b16beae49e180d83bd597dbd0b15c47f1f28875c290bfd255b9 AS builder
 
 WORKDIR /app
 
@@ -27,7 +27,7 @@ RUN npm run build
 #########################################
 # Package static build files into nginx #
 #########################################
-FROM nginxinc/nginx-unprivileged:stable-alpine@sha256:458ecbec226a23120713b35945bcdf0d6e4ea5bbec60c149ce1deca5d264071b AS cyberchef
+FROM nginxinc/nginx-unprivileged:stable-alpine@sha256:fd3314e343bad2de4e1127ef58be122abbfa7e09572fa46ae62fcddb6b3f21c5 AS cyberchef
 
 LABEL maintainer="GCHQ <oss@gchq.gov.uk>"