fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-EXPAT-7855502
- https://snyk.io/vuln/SNYK-DEBIAN12-EXPAT-7855503
- https://snyk.io/vuln/SNYK-DEBIAN12-EXPAT-7855507
- https://snyk.io/vuln/SNYK-DEBIAN12-SYSTEMD-6277507
- https://snyk.io/vuln/SNYK-DEBIAN12-SYSTEMD-6277507

Dockerfile

@@ -2,7 +2,7 @@
 
 ## THIS IS BROKEN ##################
 
-FROM python:3.13.0b1-slim
+FROM python:3.14.0a1-slim
 
 ENV PATH /app/blitz-stats:/usr/local/bin:$PATH
 # extra dependencies (over what buildpack-deps already includes)