upgrade alpine base image v3.12.3->v3.13.0 including upgrade of postsrsd v1.6-r3->1.10-r0 (diff links below, patch for CVE-2020-35573)

https://github.com/roehling/postsrsd/releases

https://git.alpinelinux.org/aports/commit/community/postsrsd?id=462e7f65cafd5c65a1db63525181e90bfa042dc3

Dockerfile

@@ -1,6 +1,6 @@
-FROM alpine:3.12.3
+FROM alpine:3.13.0
 
-ARG POSTSRSD_PACKAGE_VERSION=1.6-r3
+ARG POSTSRSD_PACKAGE_VERSION=1.10-r0
 RUN adduser -S postsrsd \
     && apk add --no-cache postsrsd=$POSTSRSD_PACKAGE_VERSION \
     && mkdir -p /etc/postsrsd/secrets \

postsrsd-package-log.url

@@ -0,0 +1 @@
+https://git.alpinelinux.org/aports/log/community/postsrsd