Refactor code structure for improved readability and maintainability

workers/bg-remove/Dockerfile

@@ -0,0 +1,21 @@
+# RunPod Serverless worker: background removal (rembg / U²-Net), CPU-only.
+# Slim Python base — NO CUDA — so it never hits the driver/kernel issues the GPU
+# models did. rembg pulls opencv (needs libgl1/libglib). Build context = repo root.
+FROM python:3.11-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        libgl1 libglib2.0-0 && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+RUN pip install --upgrade pip
+COPY workers/bg-remove/requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY workers/bg-remove/handler.py .
+
+CMD ["python3", "-u", "handler.py"]