Add settings page

server.rb

@@ -11,7 +11,8 @@ DB = Sequel.connect('sqlite://database.db')
 set :port, 8091
 set :nav, [
   { title: 'Χρήστες', href: '/users' },
-  { title: 'Συνέλευση', href: '/input' }
+  { title: 'Συνέλευση', href: '/input' },
+  { title: 'Ρυθμίσεις', href: '/settings' }
 ]
 
 get '/users' do
@@ -72,3 +73,15 @@ post '/save' do
   )
   redirect '/input'
 end
+
+get '/settings' do
+  l = {}
+  l[:user_settings] = DB[:settings].first
+  slim :settings, locals: l
+end
+
+post '/settings' do
+  DB[:settings].update(max_apousies: params['max_apousies'],
+                       prova_cost: params['prova_cost'])
+  redirect '/settings'
+end