Update node:23-alpine Docker digest to d319827 (#126)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

backend/Dockerfile

@@ -1,5 +1,5 @@
 # use node 20 alpine image as build image
-FROM node:23-alpine@sha256:3e58d4a77778684d17ab30ba8192515bd8078083df29a2d90fe7481f78f30093
+FROM node:23-alpine@sha256:d319827b3b99cca0153f6049fb584a5a4a0ae49252b6dda2314ef564f9857cf2
 
 # create work directory in app folder
 WORKDIR /app