chore(build): try to build demo and docs (#3434)

platform/app/.env

@@ -0,0 +1,11 @@
+##
+# Environment: Default
+#
+# We're using this to set variables for development.
+# Please feel free to delete or modify this file for your own setup.
+# Be careful not to commit anything sensitive to source control.
+#
+
+PUBLIC_URL=/
+APP_CONFIG=config/default.js
+USE_HASH_ROUTER=false