change Dockerfile to bookwork

Dockerfile

@@ -1,5 +1,5 @@
 # Use Python 3.11 slim image
-FROM python:3.11-slim
+FROM python:3.11-slim-bookworm
 
 # Set environment variables
 ENV PYTHONUNBUFFERED=1
@@ -10,18 +10,6 @@ ENV FLASK_SECRET=production-secret-change-me
 # Set apt sources to use a faster mirror: https://mirror.init7.net/debian/
 RUN sed -i 's|http://deb.debian.org/debian|https://mirror.init7.net/debian|g' /etc/apt/sources.list
 
-# Update lang and locale settings
-ENV LANG=en_US.UTF-8
-ENV LC_ALL=en_US.UTF-8
-RUN apt-get update && apt-get install -y locales
-RUN sed -i 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && locale-gen en_US.UTF-8
-RUN update-locale LANG=en_US.UTF-8
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US:en
-ENV LC_ALL en_US.UTF-8
-ENV TZ=Etc/UTC
-RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
-
 # Install system dependencies
 RUN apt-get update && apt-get install -y \
     gcc \