Fix a bug with the metadata during the npm package upload

Exclude the `readme` and `readmeFilename` fields sent by `$ npm publish`

Changelog: fixed

app/services/packages/npm/create_package_service.rb

@@ -4,6 +4,8 @@ module Packages
     class CreatePackageService < ::Packages::CreatePackageService
       include Gitlab::Utils::StrongMemoize
 
+      PACKAGE_JSON_NOT_ALLOWED_FIELDS = %w[readme readmeFilename].freeze
+
       def execute
         return error('Version is empty.', 400) if version.blank?
         return error('Package already exists.', 403) if current_package_exists?
@@ -22,7 +24,7 @@ module Packages
         ::Packages::Npm::CreateTagService.new(package, dist_tag).execute
 
         if Feature.enabled?(:packages_npm_abbreviated_metadata, project, default_enabled: :yaml)
-          package.create_npm_metadatum!(package_json: version_data)
+          package.create_npm_metadatum!(package_json: package_json)
         end
 
         package
@@ -50,6 +52,10 @@ module Packages
         params[:versions][version]
       end
 
+      def package_json
+        version_data.except(*PACKAGE_JSON_NOT_ALLOWED_FIELDS)
+      end
+
       def dist_tag
         params['dist-tags'].each_key.first
       end

spec/services/packages/npm/create_package_service_spec.rb

@@ -73,6 +73,23 @@ RSpec.describe Packages::Npm::CreatePackageService do
       end
     end
 
+    described_class::PACKAGE_JSON_NOT_ALLOWED_FIELDS.each do |field|
+      context "with not allowed #{field} field" do
+        before do
+          params[:versions][version][field] = 'test'
+        end
+
+        it 'is persisted without the field' do
+          expect { subject }
+            .to change { Packages::Package.count }.by(1)
+            .and change { Packages::Package.npm.count }.by(1)
+            .and change { Packages::Tag.count }.by(1)
+            .and change { Packages::Npm::Metadatum.count }.by(1)
+          expect(subject.npm_metadatum.package_json[field]).to be_blank
+        end
+      end
+    end
+
     context 'with packages_npm_abbreviated_metadata disabled' do
       before do
         stub_feature_flags(packages_npm_abbreviated_metadata: false)