Finalize local deployment config: CPU mode, persistent cache, port 8001

- docker-compose.yml: default TORCH_DEVICE=cpu, PORT=8001, named volumes
  for model cache (marker-cache) and results (marker-results) with :Z flag
- convert_both.py: API_URL defaults to port 8001, overridable via env
- TODO.md: reflect final decisions (iGPU 30x slower than CPU,
  --privileged required for GPU, CPU mode is default)

docker-compose.yml

@@ -8,36 +8,35 @@ services:
       dockerfile: Containerfile
     image: marker-api:latest
     env_file:
-      - .env          # optional; remove if no .env exists
+      - .env
     environment:
-      - OLLAMA_HOST=${OLLAMA_HOST:-http://localhost:11435}
-      - DEESEEK_OCR_MODEL=${DEESEEK_OCR_MODEL:-deepseek-ocr}
-      - AMD_COMPUTE=${AMD_COMPUTE:-true}
-      - TORCH_DEVICE=${TORCH_DEVICE:-cuda}
+      - TORCH_DEVICE=${TORCH_DEVICE:-cpu}
       - MODEL_DTYPE=${MODEL_DTYPE:-float32}
+      - OLLAMA_HOST=${OLLAMA_HOST:-http://localhost:11435}
+      - DEESEEK_OCR_MODEL=${DEESEEK_OCR_MODEL:-}
       - LLM_SERVICE=marker.services.openai.OpenAIService
-      - USE_LLM=false
+      - USE_LLM=${USE_LLM:-false}
       - OPENAI_BASE_URL=http://localhost:11435/v1
       - OPENAI_API_KEY=not-needed
       - OPENAI_MODEL=
-      - PORT=8000
+      - PORT=${PORT:-8001}
       - HOST=0.0.0.0
-      - GUNICORN_WORKERS=${GUNICORN_WORKERS:-2}
-      - GUNICORN_THREADS=${GUNICORN_THREADS:-4}
-      - GUNICORN_TIMEOUT=${GUNICORN_TIMEOUT:-300}
+      - GUNICORN_WORKERS=${GUNICORN_WORKERS:-1}
+      - GUNICORN_THREADS=${GUNICORN_THREADS:-2}
+      - GUNICORN_TIMEOUT=${GUNICORN_TIMEOUT:-600}
     ports:
-      - "8000:8000"
+      - "${PORT:-8001}:${PORT:-8001}"
     volumes:
-      - /dev/kfd:/dev/kfd
-      - /dev/dri:/dev/dri
-      - marker-data:/app/conversion_results
+      - marker-results:/app/conversion_results:rw,Z
+      - marker-cache:/app/.cache:rw,Z
     restart: unless-stopped
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
+      test: ["CMD", "curl", "-f", "http://localhost:${PORT:-8001}/health"]
       interval: 30s
       timeout: 10s
       retries: 3
       start_period: 120s
 
 volumes:
-  marker-data:
+  marker-results:
+  marker-cache: