fix: build/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE316-BUSYBOX-6913410
- https://snyk.io/vuln/SNYK-ALPINE316-BUSYBOX-6913410

build/Dockerfile

@@ -18,7 +18,7 @@ RUN CGO_ENABLED=${CGO_ENABLED_VAL} go build -v -ldflags "-w -s -X google.golang.
 
 
 # -------- prod stage -------- #
-FROM alpine:3.16
+FROM alpine:3.20.3
 
 # create non root user
 RUN addgroup --gid 101 terrascan && \