fix(docker): Add BUILDPLATFORM to config-ui builder stage and update node version (#8845)

- Use BUILDPLATFORM so the Node builder runs natively on the build host
(e.g. arm64 on Apple Silicon) rather than under x64 emulation which can
cause crashes
- Node 22 LTS builder replaces v18 which reached EOL in April 2025

Author: lrf-nitro

config-ui/Dockerfile

@@ -23,7 +23,7 @@
 #While incubation status is not necessarily a reflection of the completeness or stability of the code,
 #it does indicate that the project has yet to be fully endorsed by the ASF.
 
-FROM node:18-bookworm-slim as builder
+FROM --platform=$BUILDPLATFORM node:22-bookworm-slim AS builder
 
 WORKDIR /home/node/code
 COPY . .
@@ -47,4 +47,4 @@ RUN chmod +x /usr/bin/nginx.sh
 RUN chgrp -R 0 /etc/nginx /var/log/nginx /usr/share/nginx /run && \
     chmod -R g=u /etc/nginx /var/log/nginx /usr/share/nginx /run
 USER 101
-CMD /usr/bin/nginx.sh
+CMD ["/usr/bin/nginx.sh"]