Removed development group for cloudlare pages

Author: hsbt

Gemfile

@@ -4,11 +4,12 @@ gem "rake"
 gem "jekyll"
 gem "rouge"
 
-group :development do
-  gem "minitest"
-  gem "html-proofer"
-  gem "validate-website", "~> 1.6"
-end
+# We didn't use development group for them
+# Because lockfile is generated without `BUNDLE_WITHOUT` env variable
+# so, some environment couldn't install them
+gem "minitest"
+gem "html-proofer"
+gem "validate-website", "~> 1.6"
 
 # Jekyll need them for Ruby 3.4+
 gem "csv"