fix: Resolve security vulnerabilities

Signed-off-by: Anurag Rajawat <anurag@stepsecurity.io>

Author: anurag-stepsecurity

Dockerfile

@@ -3,7 +3,7 @@ FROM golang:1.26-alpine3.23@sha256:2389ebfa5b7f43eeafbd6be0c3700cc46690ef842ad96
 ARG GHCOMMIT_VERSION=v0.1.77
 
 # hadolint ignore=DL3018
-RUN apk add --no-cache bash git-crypt curl git
+RUN apk add --no-cache bash git-crypt curl git && apk upgrade --no-cache zlib
 
 # Download and build ghcommit from source
 RUN git clone --depth 1 --branch "${GHCOMMIT_VERSION}" https://github.com/planetscale/ghcommit.git /ghcommit