Create factory for seeding db with fake bikes, update seeds.rb

spec/factories/bikes.rb

@@ -0,0 +1,19 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :bike do
+    sequence :serial_number do |n|
+      "S/N# #{n}"
+    end
+    bike_brand_id 1
+    bike_model_id 1
+    color "FFFFFF"
+    bike_style_id 1
+    seat_tube_height 5
+    top_tube_length 6
+    wheel_size 27
+    value 100
+    bike_condition_id 1
+    bike_status_id 1
+  end
+end