add bootsnap

Gemfile

@@ -34,6 +34,7 @@ gem 'jbuilder', '~> 2.5'
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
+gem 'bootsnap', require: false
 
 gem 'haml'
 

Gemfile.lock

@@ -77,6 +77,8 @@ GEM
       execjs (~> 2)
     bcrypt (3.1.16)
     bindex (0.8.1)
+    bootsnap (1.9.1)
+      msgpack (~> 1.0)
     bootstrap (5.1.0)
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 2.9.3, < 3)
@@ -145,6 +147,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.2)
     minitest (5.14.4)
+    msgpack (1.4.2)
     multi_json (1.15.0)
     nested_scaffold (1.1.0)
     newrelic_rpm (8.0.0)
@@ -278,6 +281,7 @@ PLATFORMS
 DEPENDENCIES
   activerecord-import
   apparition!
+  bootsnap
   bootstrap
   byebug
   capybara

config/boot.rb

@@ -1,3 +1,4 @@
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
+require 'bootsnap/setup'