Full Stack Product Feed Back App using the MERN stack

Hello Coders, this is my second guru challenge. Decided to take on this huge challenge. It's a full-stack Application using the MERN stack. My first full-stack application actually. I would Like to hear your feedback on how I implemented the front end design in regards to responsiveness. I would also like to hear your thought's on the back end code.

I wanted to implement drag and drop on the roadmap page but I was having problems with syncing server state with local state. But I'm still trying to figure out a way to solve that. If you have any suggestions ill love to hear that.