feat: optimize Dockerfile for multi-stage build and user installation…

… of dependencies

Dockerfile

@@ -1,8 +1,13 @@
-FROM python:3.9-slim
+FROM python:3.9-slim as build
 WORKDIR /app
 RUN apt-get update && apt-get install -y gcc libpq-dev
 COPY requirements.txt /app
+RUN pip install --user -r requirements.txt
+
+FROM python:3.9-slim
+WORKDIR /app
+COPY --from=build /root/.local /root/.local
+ENV PATH=/root/.local/bin:$PATH
 COPY . /app
-RUN pip install -r requirements.txt
 EXPOSE 5002
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "5002"]
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "5002"]