ADD some index to projects table

db/migrate/20201021070524_add_some_index_to_projects.rb

@@ -0,0 +1,11 @@
+class AddSomeIndexToProjects < ActiveRecord::Migration[5.2]
+  def change
+    add_index :projects, :project_category_id
+    add_index :projects, :project_language_id
+    add_index :projects, :is_public
+    add_index :projects, :status
+    add_index :projects, :forked_from_project_id
+    add_index :projects, :recommend
+    add_index :projects, :platform
+  end
+end