Fixes long bundler resolution times when there is no pre-existing

Gemfile.lock.

Gemfile

@@ -7,3 +7,10 @@ gem 'activerecord-jdbcsqlite3-adapter', :platform => :jruby
 
 gem 'pry', :platform => :ruby
 gem 'pry-byebug', :platform => :ruby
+
+# Hinting at development dependencies
+# Prevents bundler from taking a long-time to resolve
+group :development, :test do
+  gem 'mime-types', '~> 1.16'
+  gem 'builder', '~> 3.1.4'
+end