fix: services/auth-ui/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE319-BUSYBOX-6913413
- https://snyk.io/vuln/SNYK-ALPINE319-BUSYBOX-6928845
- https://snyk.io/vuln/SNYK-ALPINE319-BUSYBOX-6928846
- https://snyk.io/vuln/SNYK-ALPINE319-BUSYBOX-6928846
- https://snyk.io/vuln/SNYK-ALPINE319-BUSYBOX-6928847

services/auth-ui/Dockerfile

@@ -1,7 +1,7 @@
 ################################
 # Build assets
 ################################
-FROM node:20.13.0-alpine as builder
+FROM node:20.18-alpine as builder
 
 WORKDIR /app
 
@@ -13,7 +13,7 @@ RUN npm run build
 ################################
 # Create server
 ################################
-FROM node:20.13.0-alpine
+FROM node:20.18-alpine
 
 WORKDIR /app