docs: improve docs contribution guidelines (#13605)

* docs: improve docs contribution guidelines

* fix build error

* fix build errors

* fix build

* fix build

www/apps/ui/.env.example

@@ -1,18 +1,23 @@
+# ESSENTIAL FOR DEV
+NEXT_PUBLIC_ENV=development
+NEXT_PUBLIC_BASE_URL=http://localhost:3000
+NEXT_PUBLIC_BASE_PATH=/ui
+
+# OPTIONAL FOR DEV
+ANALYZE_BUNDLE=
+
+# REQUIRED FOR PROD
 NEXT_PUBLIC_SEGMENT_API_KEY=
 NEXT_PUBLIC_DOCS_ALGOLIA_INDEX_NAME=
 NEXT_PUBLIC_API_ALGOLIA_INDEX_NAME=
 NEXT_PUBLIC_ALGOLIA_API_KEY=
 NEXT_PUBLIC_ALGOLIA_APP_ID=
-NEXT_PUBLIC_ENV=
-NEXT_PUBLIC_BASE_URL=
-NEXT_PUBLIC_BASE_PATH=
 NEXT_PUBLIC_DOCS_URL=
 NEXT_PUBLIC_RESOURCES_URL=
 NEXT_PUBLIC_UI_URL=
 NEXT_PUBLIC_API_URL=
 NEXT_PUBLIC_USER_GUIDE_URL=
 ALGOLIA_WRITE_API_KEY=
-ANALYZE_BUNDLE=
 CLOUDINARY_CLOUD_NAME=
 NEXT_PUBLIC_GA_ID=
 NEXT_PUBLIC_INTEGRATION_ID=