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>

.env.example

@@ -10,7 +10,9 @@ MYSQL_DATABASE=your-database
 
 # ===== Application Configuration =====
 # Server ports
+BACKEND_HOST=0.0.0.0
 BACKEND_PORT=8000
+FRONTEND_HOST=0.0.0.0
 FRONTEND_PORT=5173
 
 # Security (generate a random string for production)
@@ -91,3 +93,14 @@ CORS_ORIGINS=http://localhost:5173,http://127.0.0.1:5173
 # ===== Logging Configuration =====
 LOG_LEVEL=INFO
 LOG_FILE=./logs/app.log
+
+# ===== Development & Testing Configuration =====
+# Debug font path for visualization scripts
+DEBUG_FONT_PATH=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf
+# Demo documents directory for testing
+DEMO_DOCS_DIR=./demo_docs
+# E2E test API base URL
+E2E_API_BASE_URL=http://localhost:8000/api/v2
+# E2E test credentials (set in .env.local for security)
+# E2E_TEST_USER_EMAIL=test@example.com
+# E2E_TEST_USER_PASSWORD=testpassword