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-KRB5-1549480
- https://snyk.io/vuln/SNYK-DEBIAN12-KRB5-6277411
- https://snyk.io/vuln/SNYK-DEBIAN12-SHADOW-8551160
- https://snyk.io/vuln/SNYK-DEBIAN12-SHADOW-8551160

Dockerfile

@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: MPL-2.0
 
-FROM python:3.11-slim
+FROM python:3.14.0a1-slim
 
 COPY Pipfile* /app/
 WORKDIR /app/