Can't get Heroku to serve public index.html page - ruby-on-rails

Question

I've been trying to launch my project https://github.com/robdrosenberg/news-hunt on Heroku the last couple days and heroku won't serve my public/index.html page.
Here is the error I'm currently getting:
ActionController::RoutingError (No route matches [GET] "/")
This error has been brought up all over StackOverflow and I've tried as many of those solutions as I could.
For example, routing to the file directly through a welcome controller gives me an error as well
Routes
Rails.application.routes.draw do
post 'user_token' => 'user_token#create'
post 'users' => 'users#create'
namespace :api do
get 'reddit' => 'posts#reddit'
get 'producthunt' => 'posts#producthunt'
get 'medium' => 'posts#medium'
get 'hackernews' => 'posts#hackernews'
get 'githubtrending' => 'posts#githubtrending'
get 'all' => 'posts#all'
get 'bookmarks' => 'bookmarks#index'
post 'bookmarks' => 'bookmarks#create'
delete 'bookmarks' => 'bookmarks#destroy'
end
root 'welcome#index'
end
Controller
class WelcomeController < ApplicationController
def index
render file: Rails.root.join('public','index.html')
end
end
Error
ActionView::MissingTemplate (Missing template public/index.html with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:raw, :erb, :html, :builder, :ruby, :jbuilder]}. Searched in: app/app/views
Changing config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present? to = true hasn't made a difference.
I've tried using redirects which result in the app crashing from too many redirects.
What I find odd is when I try to render the file directly it searches in the app/views folder. Everything works fine locally, so it has to be something with the production environment and Heroku.
I'm using Rails in API mode and using Vue through CDN in my index.html file.
I deployed a different project the same way and had no issues. You can find that codebase here: https://github.com/robdrosenberg/commitment-ledger.
Any help is greatly appreciated!

Answer 1

You don’t actually have a public/index.html page in that repo, but rather a public/Index.html (note the case of the ‘i’ and ‘I’). This won’t make much difference if you’re developing on Windows or Mac, but on Linux (which is used on Heroku) they will be treated as different files.
Rename the file to index.html (use git mv and don’t forget to commit) and it should work.

Answer 2

Is there a reason you want to redirect to public/index? Of course, I don't know your application, so this may not be helpful. Have you considered moving your index.html file to the views/welcome directory? This is the default location that the welcome#index method will render a file from.

Answer 3

Try adding this to your config/routes.rb file:
get '', to: redirect('/Index.html')
That way the requests to the application root will redirect to the index file in the public folder.
As mentioned below you have named the file with a capital ‘I’, you will need to use the same case when referencing it in the redirect above, as updated.