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backend/Dockerfile

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+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Systeem dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libpq-dev \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# App code + entrypoint (chmod als root, vóór USER switch)
+COPY . .
+COPY entrypoint.sh /app/entrypoint.sh
+RUN chmod +x /app/entrypoint.sh
+
+# Non-root user voor security
+RUN useradd -m appuser && chown -R appuser:appuser /app
+USER appuser
+
+EXPOSE 5000
+
+ENTRYPOINT ["/app/entrypoint.sh"]
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "4", "--timeout", "120", "app:app"]