Lots of updates

db/migrate/20251111053159_create_settings.rb

@@ -0,0 +1,11 @@
+class CreateSettings < ActiveRecord::Migration[8.1]
+  def change
+    create_table :settings do |t|
+      t.string :key
+      t.string :value
+
+      t.timestamps
+    end
+    add_index :settings, :key, unique: true
+  end
+end