Merge pull request #14 from ValMati/UpdateAlpine3.15.2

Update Alpine to version 3.15.2

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.15.0
+FROM alpine:3.15.2
 
 RUN apk add --update openssh borgbackup tzdata py3-pip && \
     rm  -rf /tmp/* /var/cache/apk/*