fix: wopiserver.Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE320-BUSYBOX-7233533
- https://snyk.io/vuln/SNYK-ALPINE320-BUSYBOX-7233533
- https://snyk.io/vuln/SNYK-ALPINE320-BUSYBOX-7233533
- https://snyk.io/vuln/SNYK-ALPINE320-BUSYBOX-7233586
- https://snyk.io/vuln/SNYK-ALPINE320-BUSYBOX-7233586

wopiserver.Dockerfile

@@ -3,7 +3,7 @@
 # Build: make docker or docker-compose -f wopiserver.yaml build --build-arg VERSION=`git describe | sed 's/^v//'` BASEIMAGE=... wopiserver
 
 ARG VERSION=latest
-ARG BASEIMAGE=python:3.12.3-alpine
+ARG BASEIMAGE=python:3.13.0rc1-alpine
 
 FROM $BASEIMAGE