Python 3.11 and bump to Debian Bookworm w/ multi-stage build

.python-version

@@ -1 +1 @@
-3.9.1
+3.11.9

Dockerfile

@@ -1,25 +1,37 @@
-FROM python:3.10-slim-bullseye
+# Stage 1: Build
+FROM python:3.11-slim-bookworm as builder
 
-EXPOSE 9808
-ENV PYTHONUNBUFFERED 1
+ENV PYTHONUNBUFFERED=1 \
+    POETRY_NO_INTERACTION=1 \
+    POETRY_VIRTUALENVS_IN_PROJECT=1 \
+    POETRY_VIRTUALENVS_CREATE=1 \
+    POETRY_CACHE_DIR=/tmp/poetry_cache
 
 WORKDIR /app/
 COPY pyproject.toml poetry.lock /app/
 RUN apt-get update && \
     apt-get -y dist-upgrade && \
-    apt install -y locales libcurl4-openssl-dev libssl-dev build-essential\
-        && apt-get clean \
-        && rm -rf /var/lib/apt/lists/* \
-    && pip install -U pip poetry \
-    && rm -rf /root/.cache \
-    && poetry config virtualenvs.create false \
-    && poetry install --no-interaction \
-    && rm -rf /root/.cache \
-    && apt remove -y build-essential \
-    && adduser --disabled-login exporter
+    apt install -y locales libcurl4-openssl-dev libssl-dev build-essential && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* && \
+    pip install -U pip poetry && \
+    poetry install --without dev --no-root && \
+    rm -rf $POETRY_CACHE_DIR
 
-USER exporter
+# Stage 2: Runtime environment
+FROM python:3.11-slim-bookworm
 
+ENV PYTHONUNBUFFERED=1 \
+    VIRTUAL_ENV=/app/.venv \
+    PATH="/app/.venv/bin:$PATH"
+
+COPY --from=builder ${VIRTUAL_ENV} ${VIRTUAL_ENV}
 COPY . /app/
 
+EXPOSE 9808
+
+RUN adduser --disabled-login exporter
+
+USER exporter
+
 ENTRYPOINT ["python", "/app/cli.py"]