feat: Major updates to backend structure and security enhancements

- Removed `COMMON_ERRORS.md` file to streamline documentation.
- Added `Flask-Limiter` for rate limiting and `redis` for session management in `requirements.txt`.
- Expanded `ROADMAP.md` to include completed security features and planned enhancements for version 2.2.
- Enhanced `setup_myp.sh` for ultra-secure kiosk installation, including system hardening and security configurations.
- Updated `app.py` to integrate CSRF protection and improved logging setup.
- Refactored user model to include username and active status for better user management.
- Improved job scheduler with uptime tracking and task management features.
- Updated various templates for a more cohesive user interface and experience.

backend/app/node_modules/node-releases/README.md

@@ -0,0 +1,12 @@
+# Node.js releases data
+
+All data is located in `data` directory.
+
+`data/processed` contains `envs.json` with node.js releases data preprocessed to be used by [Browserslist](https://github.com/ai/browserslist) and other projects. Each version in this file contains only necessary info: version, release date, LTS flag/name, and security flag.
+
+`data/release-schedule` contains `release-schedule.json` with node.js releases date and end of life date.
+
+## Installation
+```bash
+npm install node-releases
+```