Initial psopeeps site import

backend/Dockerfile

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+FROM python:3.12-slim
+
+WORKDIR /app
+
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app.py key_routes.py .
+
+CMD ["sh", "-c", "gunicorn --bind 0.0.0.0:${APP_PORT:-8000} --workers 2 --threads 4 app:app"]