fix: rework Dockerfile for Debian 12

Dockerfile

@@ -1,42 +1,34 @@
-FROM ghcr.io/osgeo/gdal:ubuntu-full-latest
+FROM python:3.12.3-slim-bookworm
+
+RUN adduser --disabled-password terraso
 
 ENV PATH /home/terraso/.local/bin:$PATH
 # see https://github.com/aws/aws-cli/tags for list of versions
 ENV AWS_CLI_VERSION 2.8.12
 
-RUN apt-get update && \
-    apt-get install -q -y --no-install-recommends software-properties-common
+# Add testing sources and pin the GDAL packages to testing
+# Allows us to get 3.8.x versions of GDAL
+RUN sed 's/bookworm/testing/g' /etc/apt/sources.list.d/debian.sources >  /etc/apt/sources.list.d/testing.sources
 
-# prevent tzdata from prompting
-RUN ln -fs /usr/share/zoneinfo/America/New_York /etc/localtime
+RUN echo 'Package: libgdal-dev gdal-bin\nPin: release a=testing\nPin-Priority: 900' > /etc/apt/preferences.d/gdal-testing
 
 RUN apt-get update && \
     apt-get install -q -y --no-install-recommends \
-                     python3.12 python3.12-dev \
                      build-essential libpq-dev dnsutils libmagic-dev mailcap \
-                     gettext \
-                     libkml-dev unzip curl && \
+                     gettext software-properties-common \
+                     libkml-dev libgdal-dev gdal-bin unzip curl && \
     curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" && \
     unzip awscliv2.zip && \
     ./aws/install && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
-RUN mkdir -p /root/.config/pip && echo "[global]" > /root/.config/pip/pip.conf && echo "break-system-packages = true" >> /root/.config/pip/pip.conf
-RUN curl -s https://bootstrap.pypa.io/get-pip.py | python3.12
-
-RUN adduser --disabled-password terraso
-
 WORKDIR /app
 
 COPY --chown=terraso:terraso requirements.txt /app
 COPY --chown=terraso:terraso Makefile /app
 
 USER terraso
 
-RUN pip config set global.break-system-packages true
-
-# there is no python3.12-pytest, so install manually
-RUN pip install pytest
 RUN pip install --upgrade pip && make install
 
 COPY --chown=terraso:terraso . /app