fix: Dockerfile to reduce vulnerabilities (#2293)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-LIBXML2-8738027
- https://snyk.io/vuln/SNYK-DEBIAN12-NGINX-5953391
- https://snyk.io/vuln/SNYK-DEBIAN12-ABSEIL-8740787
- https://snyk.io/vuln/SNYK-DEBIAN12-LIBCAP2-8732577

Co-authored-by: snyk-bot <[email protected]>

Author: IOhacker

Diff for: Dockerfile

@@ -2,7 +2,7 @@
 ### STAGE 1: Build app
 ###############
 ARG BUILDER_IMAGE=node:22.9.0-alpine
-ARG NGINX_IMAGE=nginx:1.27.4
+ARG NGINX_IMAGE=nginx:1.27.4-alpine3.21-slim
 
 FROM $BUILDER_IMAGE as builder
 ARG NPM_REGISTRY_URL=https://registry.npmjs.org/