fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-ZLIB-6008963
- https://snyk.io/vuln/SNYK-DEBIAN12-APT-1541449
- https://snyk.io/vuln/SNYK-DEBIAN12-APT-1541449
- https://snyk.io/vuln/SNYK-DEBIAN12-COREUTILS-1543939
- https://snyk.io/vuln/SNYK-DEBIAN12-SHADOW-1559391

Dockerfile

@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: MPL-2.0
 
-FROM python:3.11-slim
+FROM python:3.13.0b4-slim
 
 COPY Pipfile* /app/
 WORKDIR /app/