Fullstack application with React, Redux, Express, MongoDB

Hello everyone,

this is my fullstack application, one page of which (page of specific post) is based on design given by frontend mentor. I didn't use any figma wireframe, only images and style guide in .md file.

Please check it out and give me your feedback. What do you think I should pay more attention to and how can I make it to look more professional ? This is one of my portfolio projects so I want it to present me as a developer from the better side.

Thanks for your time!