feat(dockerfile): Update alpine and mariadb versions

Set to latest upstream source versions. Alpine 3.20 and MariaDB 10.11.8.

Dockerfile

@@ -3,8 +3,8 @@
 #
 
 # build arguments
-ARG ALPINE_VERSION="3.19"
-ARG MARIADB_VERSION="10.11.6-r0"
+ARG ALPINE_VERSION="3.20"
+ARG MARIADB_VERSION="10.11.8-r0"
 
 FROM alpine:${ALPINE_VERSION}
 ARG ALPINE_VERSION