You can prevent rails’ file server from serving index.html, while continuing to serve other files from the public directory by changing the index_name:
class Application
config.public_file_server.index_name = "other-index.html"
end
Rails.application.routes.draw do
get :dashboard, to: "application#dashboard"
root to: redirect("/dashboard")
end
Visiting the root path / will no longer serve public/index.html if you define another route for /