Update Node.js to v26.4.0

Author: renovate[bot]

Dockerfile

@@ -17,7 +17,7 @@ RUN set -ex && \
   -w -s" \
   -o /bin/bff
 
-FROM --platform=$BUILDPLATFORM node:26.3.1-alpine3.23@sha256:bead114a5f13c3f193e6278d28bc10a3e0cd464cb1c764c1abac79b1cc15f64f AS web-builder
+FROM --platform=$BUILDPLATFORM node:26.4.0-alpine3.23@sha256:aa0d6534a72362ba0ab3c98b662ed680c32484e0aff8e0ce0888451085796a61 AS web-builder
 
 ARG BUILD_VERSION