add 'bullet' gem in development mode

This helps find n+1 queries, which seem to be one of the
main causes of production slowness.

1 files changed, 1 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 907ca371..15db2e59 100644
--- a/Gemfile
+++ b/Gemfile
@@ -47,6 +47,7 @@ group :development, :test do
   gem "sqlite3"
   gem 'byebug'
   gem 'ruby-prof'
+  gem 'bullet'
 end
 
 group :test do