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/e2e/test_pdf_layout_restoration.py

@@ -12,17 +12,24 @@ Run with: pytest backend/tests/e2e/test_pdf_layout_restoration.py -v -s
 import pytest
 import requests
 import time
+import os
 from pathlib import Path
 from typing import Optional
 import json
 
 # Configuration
-API_BASE_URL = "http://localhost:8000/api/v2"
-DEMO_DOCS_PATH = Path(__file__).parent.parent.parent.parent / "demo_docs"
+_default_backend_port = os.getenv("BACKEND_PORT", "8000")
+_default_base_url = f"http://localhost:{_default_backend_port}"
+_api_base = os.getenv("TOOL_OCR_E2E_API_BASE_URL", _default_base_url).rstrip("/")
+API_BASE_URL = f"{_api_base}/api/v2"
+DEMO_DOCS_PATH = Path(
+    os.getenv("TOOL_OCR_DEMO_DOCS_DIR")
+    or (Path(__file__).resolve().parents[3] / "demo_docs")
+)
 
-# Test credentials
-TEST_USERNAME = "ymirliu@panjit.com.tw"
-TEST_PASSWORD = "4RFV5tgb6yhn"
+# Test credentials must be provided via environment variables
+TEST_USERNAME = os.getenv("TOOL_OCR_E2E_USERNAME")
+TEST_PASSWORD = os.getenv("TOOL_OCR_E2E_PASSWORD")
 
 
 class TestBase:
@@ -31,6 +38,9 @@ class TestBase:
     @pytest.fixture(scope="class")
     def auth_token(self):
         """Authenticate and get access token."""
+        if not TEST_USERNAME or not TEST_PASSWORD:
+            pytest.skip("Set TOOL_OCR_E2E_USERNAME and TOOL_OCR_E2E_PASSWORD to run E2E tests")
+
         response = requests.post(
             f"{API_BASE_URL}/auth/login",
             json={