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>

backend/tests/archived/test_ppstructure_params_e2e.py

@@ -7,13 +7,16 @@ import pytest
 import requests
 import time
 import json
+import os
 from pathlib import Path
 from typing import Optional, Dict
 
-# Test configuration
-API_BASE_URL = "http://localhost:8000/api/v2"
-TEST_USER_EMAIL = "ymirliu@panjit.com.tw"
-TEST_USER_PASSWORD = "4RFV5tgb6yhn"
+# Test configuration - use environment variable or settings
+from app.core.config import settings
+
+API_BASE_URL = settings.e2e_api_base_url
+TEST_USER_EMAIL = os.getenv("E2E_TEST_USER_EMAIL", "test@example.com")
+TEST_USER_PASSWORD = os.getenv("E2E_TEST_USER_PASSWORD", "testpassword")
 
 # Test documents (assuming these exist in demo_docs/)
 TEST_DOCUMENTS = {