Update OCR service command in docker-compose.yml to use pipeline configuration file

- Modified the OCR service command to check for the existence of the pipeline configuration file and download it if not present, enhancing the setup process.
- Added a volume mount for the paddlex directory to ensure access to necessary files during execution.

docker-compose.yml

@@ -758,11 +758,15 @@ services:
       python -m pip install --upgrade pip; \
       python -m pip install --no-cache-dir 'paddlex[ocr]'; \
       python -m paddlex --install serving; \
-      exec python -m paddlex --serve --pipeline OCR --device cpu --port 8080"
+      if [ ! -f /app/PP-ChatOCRv3-doc.yaml ]; then \
+        python -m paddlex --get_pipeline_config PP-ChatOCRv3-doc --save_path /app; \
+      fi; \
+      exec python -m paddlex --serve --pipeline /app/PP-ChatOCRv3-doc.yaml --device cpu --port 8080"
     volumes:
       - paddleocr_cache:/root/.paddleocr
       - paddle_cache:/root/.cache/paddle
       - paddlex_data:/root/.paddlex
+      - ./paddlex:/app
     healthcheck:
       test: ["CMD-SHELL", "wget -qO- http://localhost:8080 > /dev/null || exit 1"]
       interval: 30s