Fix check_files_owner_in_dir.sh script not found error, fixes aquasec…

…urity#1746

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23.4 AS build
+FROM golang:1.23.4-bookworm AS build
 WORKDIR /go/src/github.com/aquasecurity/kube-bench/
 COPY makefile makefile
 COPY go.mod go.sum ./
@@ -40,13 +40,17 @@ RUN wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/s
 RUN apk add gcompat
 RUN apk add jq
 
-ENV PATH=$PATH:/usr/local/mount-from-host/bin
+# Add bash for running helper scripts
+RUN apk add bash
+
+ENV PATH=$PATH:/usr/local/mount-from-host/bin:/go/bin
 
 COPY --from=build /go/bin/kube-bench /usr/local/bin/kube-bench
 COPY --from=build /usr/local/bin/kubectl /usr/local/bin/kubectl
 COPY entrypoint.sh .
 COPY cfg/ cfg/
-COPY helper_scripts/check_files_owner_in_dir.sh /go/bin
+COPY helper_scripts/check_files_owner_in_dir.sh /go/bin/
+RUN chmod a+x /go/bin/check_files_owner_in_dir.sh
 ENTRYPOINT ["./entrypoint.sh"]
 CMD ["install"]