update Dockerfile to use poetry

Author: vrtornisiello

Dockerfile

@@ -3,8 +3,15 @@ FROM python:3.13-slim
 WORKDIR /app/frontend
 
 COPY . .
-RUN pip install --upgrade pip && pip install --no-cache-dir .
+
+RUN pip install --upgrade pip && \
+    pip install --user pipx
+
+ENV PATH="/root/.local/bin:$PATH"
+
+RUN pipx install poetry==2.1.3 && \
+    poetry install --only main
 
 EXPOSE 8501
 
-CMD ["bash", "-c", "streamlit run frontend/main.py"]
+CMD ["bash", "-c", "poetry run streamlit run frontend/main.py"]