Add documentation for startup scripts

STARTUP_README.md

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+# LEGO Instructions Manager - Startup Scripts
+
+## Quick Start
+
+1. **First Time Setup:**
+   - Double-click `start_lim.bat` to test if the application starts correctly
+   - This will create a virtual environment and install all dependencies
+
+2. **Set Up Automatic Startup:**
+   - Right-click `setup_startup.bat` and select "Run as Administrator"
+   - This will configure Windows to start the application automatically when you log in
+
+## Files Included
+
+### start_lim.bat
+Main startup script that:
+- Creates a Python virtual environment if it doesn't exist
+- Installs/updates all required dependencies from requirements.txt
+- Initializes the database if needed
+- Starts the Flask application
+
+### setup_startup.bat
+Configuration script that:
+- Creates a Windows Task Scheduler entry
+- Sets the application to run at user logon
+- Requires Administrator privileges
+
+## Manual Startup
+
+To manually start the application, simply double-click `start_lim.bat`
+
+## Removing Automatic Startup
+
+To stop the application from starting automatically, open Command Prompt as Administrator and run:
+```
+schtasks /delete /tn "LEGO Instructions Manager" /f
+```
+
+## Troubleshooting
+
+If the application fails to start:
+1. Check that Python is installed and in your PATH
+2. Ensure you have internet connectivity for dependency installation
+3. Verify the E:\LIM directory exists and contains the application files
+4. Check the Flask application logs in the console window
+
+## Notes
+
+- The application will run in a console window - don't close this window or the app will stop
+- To access the application, open your browser and go to http://localhost:5000
+- The virtual environment and dependencies are stored in E:\LIM\venv\