feat: consolidate env config and add deployment files

- Add debug_font_path, demo_docs_dir, e2e_api_base_url to config.py
- Fix hardcoded paths in pp_structure_debug.py, create_demo_images.py
- Fix hardcoded paths in test files
- Update .env.example with new configuration options
- Update .gitignore to exclude AI development files (.claude/, openspec/, AGENTS.md, CLAUDE.md)
- Add production startup script (start-prod.sh)
- Add README.md with project documentation
- Add 1panel Docker deployment files (docker-compose.yml, Dockerfiles, nginx.conf)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/run_preprocessing_tests.py

@@ -3,8 +3,7 @@
 Test script for PDF Preprocessing Pipeline.
 
 Usage:
-    cd /home/egg/project/Tool_OCR
-    PYTHONPATH=backend python3 scripts/test_preprocessing_pipeline.py
+    PYTHONPATH=backend python3 scripts/run_preprocessing_tests.py
 """
 
 import sys