🔒️(backend) upgrade base image to python:3.13.15-alpine3.24

Fixes an XML injection attack in libexpat (CVE-2026-93990)

CHANGELOG.md

@@ -42,6 +42,7 @@ and this project adheres to
 - 🔒️(backend) reject inactive users in resource server backend
 - 🐛(frontend) fix file permissions in the Docker image
 - 🚸(frontend) inform user that recording waits until a track is published
+- 🔒(backend) upgrade base image to python:3.13.15-alpine3.24
 
 ## [1.31.0] - 2026-09-08
 

Dockerfile

@@ -1,7 +1,7 @@
 # Django Meet
 
 # ---- base image to inherit from ----
-FROM python:3.13.5-alpine3.21 AS base
+FROM python:3.13.15-alpine3.24 AS base
 
 # Upgrade pip to its latest release to speed up dependencies installation
 RUN python -m pip install --upgrade pip