Bumps alpine from 3.12 to 3.13.1. Signed-off-by: dependabot[bot] <support@github.com>
@@ -1,4 +1,4 @@
-FROM alpine:3.12
+FROM alpine:3.13.1
ARG RSYNC_PACKAGE_VERSION=3.1.3-r3
ARG OPENSSH_SERVER_PACKAGE_VERSION=8.3_p1-r1