fix: build/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN11-DPKG-2847942
- https://snyk.io/vuln/SNYK-DEBIAN11-OPENSSL-2807596
- https://snyk.io/vuln/SNYK-DEBIAN11-PCRE2-2808697
- https://snyk.io/vuln/SNYK-DEBIAN11-PCRE2-2808704
- https://snyk.io/vuln/SNYK-DEBIAN11-UTILLINUX-2401081

build/Dockerfile

@@ -1,6 +1,6 @@
 FROM golang:1.17 as golang
 
-FROM debian:bullseye as build
+FROM debian:11 as build
 COPY --from=golang /usr/local/go /usr/local/go
 ENV PATH=/usr/local/go/bin:$PATH
 ENV GOPATH=${GOPATH:-/go}