eindelijk weer eens een push

dev/zos-web/backend/Dockerfile

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+FROM ubuntu:24.04
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Layer 1: OS packages - only rebuilds if this changes
+RUN apt-get update && apt-get install -y \
+    python3 python3-pip x3270 s3270 \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Layer 2: Python deps - only rebuilds if requirements.txt changes
+COPY requirements.txt .
+RUN pip3 install --break-system-packages -r requirements.txt
+
+# Layer 3: Python code - rebuilds on every code change
+COPY *.py .
+
+EXPOSE 8000
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--log-level", "info"]