Both our dashboard and frontend is Bootstrap based with mongo deployed over shared atlas cluster and app on herokup.
We have used the base components for our dashboard from Flexy lite -https://www.wrappixel.com/templates/flexy-admin-lite/ For FrontEnd of site we have used images and design components then iterated over it to make site mold according to our use case from Bagan - https://html.xpeedstudio.com/bagan/