fix: build/Dockerfile to reduce vulnerabilities (#28)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN11-GNUTLS28-6062102
- https://snyk.io/vuln/SNYK-DEBIAN11-LIBGCRYPT20-1297892
- https://snyk.io/vuln/SNYK-DEBIAN11-LIBGCRYPT20-523947
- https://snyk.io/vuln/SNYK-DEBIAN11-PERL-6085272
- https://snyk.io/vuln/SNYK-DEBIAN11-ZLIB-6008961

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

build/Dockerfile

@@ -1,6 +1,6 @@
 FROM golang:1.20 as golang
 
-FROM debian:11 as build
+FROM debian:bookworm-20231030 as build
 COPY --from=golang /usr/local/go /usr/local/go
 ENV PATH=/usr/local/go/bin:$PATH
 ENV GOPATH=${GOPATH:-/go}