dockerfile: always upgrade busybox and zlib

Fix CVE-2022-37434 issue

Signed-off-by: Derek Su <derek.su@suse.com>
(cherry picked from commit 207a41c8)

package/Dockerfile

 FROM alpine
+
+RUN apk update
+RUN apk upgrade --no-cache busybox zlib
+
 COPY bin/local-path-provisioner /usr/bin/
 CMD ["local-path-provisioner"]