admin boolean column is probably sufficient w/ some sort of authenticate_admin! for controllers

Maybe...?

def authenticate_admin!
  authenticate_user! && current_user.admin?
end

Should get to trail show and new pages. Might want an admin homepage that's like a trails index view but with links to the show, new, and edit routes.

They're ugly.

React component that should keep track of number of miles hiked out of total trail miles with a CSS progress bar

Codepen example

We want to reuse trails since there's a fixed number of them. Users can have many trails and trails can belong to many users.

For completion of trails, a UserTrail association join model could be created when a user checks off a trail they've hiked.

Title, user stuff

Static homepage w/ user sign-in/sign-up.

Only show if not signed in, otherwise direct homepage to trails index.