Todo app using ReactJS

Hey, there! 🙋🏻

I've had a great time working on my first challenge on Frontend Mentor. 🤗

I'd appreciate feedbacks on:

• what can be improved on the way the code is structured.
• any ideas on how to fix the HTML validation errors.

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Here's a list of useful resources I learned a lot from when working on this challenge:

• Gradient Borders in CSS
• How I Theme My React App With Sass
• Sass Essential Training
• Sass mixin to have multiple theme based background images
• Session Storage and Local Storage in React
• How to Add Drag and Drop in React with React Beautiful DnD

Happy coding, everyone! 🙃