handle add/remove homies in backend

db/migrate/20200911162613_add_default_chip_to_homies.rb

@@ -0,0 +1,5 @@
+class AddDefaultChipToHomies < ActiveRecord::Migration[5.2]
+  def change
+    add_reference :homies, :chip
+  end
+end

db/migrate/20200911171657_change_default_value_for_importance_in_homies.rb

@@ -0,0 +1,5 @@
+class ChangeDefaultValueForImportanceInHomies < ActiveRecord::Migration[5.2]
+  def change
+    change_column_default :homies, :importance, 100
+  end
+end