updated dockerfile

Dockerfile

@@ -1,21 +1,46 @@
-FROM python:3.11-slim-buster
+# The builder image, used to build the virtual environment
+FROM python:3.11-slim-buster as builder
+
+RUN apt-get update && apt-get install -y git
+
+RUN pip install poetry==1.4.2
+
+ENV POETRY_NO_INTERACTION=1 \
+    POETRY_VIRTUALENVS_IN_PROJECT=1 \
+    POETRY_VIRTUALENVS_CREATE=1 \
+    POETRY_CACHE_DIR=/tmp/poetry_cache
 
 WORKDIR /app
 
-COPY app/requirements.txt /app/requirements.txt
+COPY pyproject.toml poetry.lock ./
 
-RUN pip3 install --no-cache-dir --upgrade -r /app/requirements.txt
+RUN poetry install --without dev --no-root && rm -rf $POETRY_CACHE_DIR
+
+# The runtime image, used to just run the code provided its virtual environment
+FROM python:3.11-slim-buster as runtime
 
-# User
 RUN useradd -m -u 1000 user
+
 USER user
-ENV HOME /home/user
-ENV PATH $HOME/.local/bin:$PATH
 
-WORKDIR $HOME
-RUN mkdir app
+ENV HOME=/home/user \
+    PATH="/home/user/.local/bin:$PATH" \
+    VIRTUAL_ENV=/app/.venv \
+    LISTEN_PORT=8000 \
+    HOST=0.0.0.0
+
 WORKDIR $HOME/app
-COPY . $HOME/app
 
-EXPOSE 8000
+COPY --from=builder --chown=user ${VIRTUAL_ENV} ${VIRTUAL_ENV}
+
+COPY --chown=user ./app ./app
+COPY --chown=user ./.chainlit ./.chainlit
+COPY --chown=user ./.env ./.env
+COPY --chown=user chainlit.md ./
+
+EXPOSE $LISTEN_PORT
+
+# If chainlit is a Python package that needs to be installed, uncomment the following line:
+RUN pip install -r app/requirements.txt
+
 CMD ["chainlit", "run", "app/spark.py"]