upgrade alpine base image v3.13.2->3.13.3 including openssh-server package upgrade v8.4_p1-r2->v8.4_p1-r3 (diff links below, CVE-2020-14145 only relevant for clients)

https://ubuntu.com/security/CVE-2020-14145

https://git.alpinelinux.org/aports/commit/main/openssh?id=3a797aaebe72b0c92b602223a960d273986cbc46
https://git.alpinelinux.org/aports/commit/main/openssh?id=c73bf359dd445e718165b219c14a4bd3779cede2

https://github.com/fphammerle/docker-ssh-bastion/commit/a36338c425756d78273a86ffe17985a5d90f2d39

Dockerfile

@@ -1,7 +1,7 @@
-FROM alpine:3.13.2
+FROM alpine:3.13.3
 
 ARG RSYNC_PACKAGE_VERSION=3.2.3-r1
-ARG OPENSSH_SERVER_PACKAGE_VERSION=8.4_p1-r2
+ARG OPENSSH_SERVER_PACKAGE_VERSION=8.4_p1-r3
 RUN apk add --no-cache \
     openssh-server=$OPENSSH_SERVER_PACKAGE_VERSION \
     rrsync=$RSYNC_PACKAGE_VERSION \