Refactor code structure for improved readability and maintainability

workers/detect/Dockerfile

@@ -0,0 +1,22 @@
+FROM nvidia/cuda:12.1.1-cudnn8-runtime-ubuntu22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3 python3-pip python3-dev \
+    libgl1 libglib2.0-0 \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN ln -sf /usr/bin/python3 /usr/bin/python
+
+WORKDIR /app
+
+COPY workers/detect/requirements.txt .
+RUN pip3 install --no-cache-dir -r requirements.txt
+
+# Bake in the trained construction-material model and point the worker at it.
+COPY workers/detect/best.pt .
+ENV YOLO_MODEL=/app/best.pt
+
+COPY workers/detect/handler.py .
+
+CMD ["python3", "-u", "handler.py"]