Add standard task for linting JavaScript

lib/tasks/lint.rake

@@ -8,10 +8,15 @@ task erblint: :environment do
   sh "bundle exec erblint --lint-all"
 end
 
+desc "Run Standard"
+task standard: :environment do
+  sh "yarn standard"
+end
+
 desc "Run Stylelint"
 task stylelint: :environment do
   sh "yarn stylelint app/frontend/styles"
 end
 
 desc "Run all the linters"
-task lint: %i[rubocop erblint stylelint]
+task lint: %i[rubocop erblint standard stylelint]

package.json

@@ -36,6 +36,7 @@
   "version": "0.1.0",
   "devDependencies": {
     "are-you-es5": "^2.1.2",
+    "standard": "^17.0.0",
     "stylelint": "^14.7.1",
     "stylelint-config-gds": "^0.2.0"
   },