Switch to slim base image

Dockerfile

-FROM python:3.9.12-bullseye AS base
+FROM python:3.9.12-slim-bullseye AS base
 
 ENV PYTHONUNBUFFERED=1
 
 WORKDIR /steering
 COPY requirements.txt .
+
+RUN apt-get update && apt-get install -y libmagic1
+
 RUN pip install --upgrade pip
 RUN pip install --no-cache-dir -r requirements.txt