upgrade alpine base image from v3.13.5 to v3.14.0 including openssh-server package upgrade from v8.4_p1-r3 to v8.6_p1-r1 (see links below)

https://www.openssh.com/releasenotes.html

https://git.alpinelinux.org/aports/commit/main/openssh?id=0b054e01f0e4a5071d3e2512123a25af1afa2d54
https://git.alpinelinux.org/aports/commit/main/openssh?id=5d33acaf52405becd402c4734e383588fb3305d9
https://git.alpinelinux.org/aports/commit/main/openssh?id=dcb8f3d224341a03fd01d43309ba585b22c12bd8
https://git.alpinelinux.org/aports/commit/main/openssh?id=690206586dcaacf5de07385f53ed15dbf9206944
https://git.alpinelinux.org/aports/commit/main/openssh?id=827140e314189d71385b7c9fd42854775283061b
https://git.alpinelinux.org/aports/commit/main/openssh?id=7befdd7374d9ef43c62e872083f22cb43e3ab489

Dockerfile

@@ -1,6 +1,6 @@
-FROM alpine:3.13.5
+FROM alpine:3.14.0
 
-ARG OPENSSH_SERVER_PACKAGE_VERSION=8.4_p1-r3
+ARG OPENSSH_SERVER_PACKAGE_VERSION=8.6_p1-r1
 RUN apk add --no-cache openssh-server=$OPENSSH_SERVER_PACKAGE_VERSION
 
 ENV SSHD_HOST_KEYS_DIR /etc/ssh/host_keys