Added ingredient index and form

app/controllers/ingredients_controller.rb

@@ -1,6 +1,10 @@
 class IngredientsController < ApplicationController
+  before_action :find_project_by_project_id, only: [:index, :create]
+  before_action :authorize
 
   def index
+    @ingredient = Ingredient.new
+    @ingredients = @project.ingredients
   end
 
   def create