Bring everything up-to-date

Dockerfile

@@ -1,20 +1,18 @@
-FROM python:3.8-slim-buster
-
-# Keeps Python from generating .pyc files in the container
-ENV PYTHONDONTWRITEBYTECODE 1
-
-# Turns off buffering for easier container logging
-ENV PYTHONUNBUFFERED 1
+FROM python:3.11-alpine AS base
 
+FROM base AS build
 ADD requirements.txt .
-RUN python -m pip install -r requirements.txt
+RUN python -m pip install --user -r requirements.txt
 
+FROM base AS app
+RUN adduser -h /app -D appuser
+COPY --from=build --chown=appuser /root/.local /app/.local
 WORKDIR /app
-COPY main.py /app
-
-RUN useradd appuser && chown -R appuser /app
+COPY --chown=appuser main.py /app
 USER appuser
 
+FROM app
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
 EXPOSE 5000
-
 ENTRYPOINT ["python", "main.py"]