Fixes and improvements

backend/Dockerfile

@@ -1,17 +1,11 @@
-FROM python:3.8-slim-bullseye
+FROM python:3.11-slim-bullseye
 
 WORKDIR /app
 
-RUN apt update && \
-    apt install -y --no-install-recommends \
-        gdal-bin \
-        libxml2 libxml2-dev gettext \
-        libxslt1-dev libjpeg-dev libpng-dev libpq-dev libgdal-dev \
-        software-properties-common g++ \
-        zlib1g-dev libgeos-dev libproj-dev \
-        sqlite3 spatialite-bin libsqlite3-mod-spatialite \
-        wkhtmltopdf && \
-    apt clean
+RUN apt update \
+    && apt install -y --no-install-recommends gdal-bin \
+    && rm -rf /var/lib/apt/lists/* \
+    && apt clean
 
 COPY ./requirements.txt /app/requirements.txt