feat: improve Docker image

Dockerfile

@@ -1,15 +1,24 @@
-FROM python:3.11-bookworm
+FROM python:3.11-bookworm as build
 
-RUN apt update && apt install -y libapt-pkg-dev && \
-    rm -rf /var/lib/apt/lists/* && \
+ENV PIPENV_VENV_IN_PROJECT=1
+
+RUN apt update && \
+    apt install -y libapt-pkg-dev && \
     pip install pipenv
 
-WORKDIR /app
+WORKDIR /build
+
+COPY Pipfile Pipfile.lock ./
 
-COPY Pipfile Pipfile.lock app.py apt_info.py ./
+RUN pipenv sync
+
+FROM build
+
+WORKDIR /app
 
-RUN pipenv install --deploy --ignore-pipfile
+COPY --from=build /build/.venv/ ./.venv/
+COPY app.py apt_info.py ./
 
 EXPOSE 8000
 
-CMD ["pipenv", "run", "uvicorn", "app:app", "--host", "0.0.0.0", "--no-access-log"]
+CMD ["/app/.venv/bin/uvicorn", "app:app", "--host", "0.0.0.0", "--no-access-log"]