fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-PERL-5489190
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969
- https://snyk.io/vuln/SNYK-DEBIAN12-PAM-10378969

Author: snyk-bot

Dockerfile

@@ -8,7 +8,7 @@ COPY . .
 RUN go build -v -o /run-app .
 
 
-FROM debian:12.11
+FROM debian:bookworm-20250929
 
 COPY --from=builder /run-app /usr/local/bin/
 CMD ["run-app"]