fix: services/gateway-service/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-SYSTEMD-10264074
- https://snyk.io/vuln/SNYK-DEBIAN12-SYSTEMD-10264074
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-COREUTILS-10259258
- https://snyk.io/vuln/SNYK-DEBIAN12-PERL-10244568

Author: snyk-bot

services/gateway-service/Dockerfile

@@ -15,7 +15,7 @@ RUN wget https://github.com/minio/certgen/releases/latest/download/certgen-linux
 RUN /tmp/certgen -host "127.0.0.1,gateway-service,api.mypremiumdealership.com,mypremiumdealership.com"
 RUN ls -la
 
-FROM debian:bookworm-slim
+FROM debian:12.11-slim
 SHELL ["/bin/bash", "-c"]
 WORKDIR /app