WIP Profile settings page

Show the user's user address, and provide a button for copying it to the
clipboard

config/routes.rb

@@ -12,6 +12,7 @@ Rails.application.routes.draw do
 
   namespace :settings do
     get 'profile', to: 'profile#index'
+    post 'profile', to: 'profile#update'
     get 'account', to: 'account#index'
     post 'reset_password', to: 'account#reset_password'
   end