How to turn off Rails caching during development - ruby-on-rails

Question

I'm on Rails 5.2.2 and I'm building a web app that uses some static HTML, CSS, and JavaScript that I'm serving from inside of the public directory. Much of the time when I update a file it doesn't update in my browser when I refresh, but if I go into private browsing it works -- until it caches again and then I need to open a new private window.
How can I turn off caching for file in the public folder? Or if it's easier, how can I turn off all caching during development?
This is what my development.rb looks like. I tried commenting out the entire if Rails.root.join('tmp', 'caching-dev.txt').exist? block but that didn't do anything.
I'm also open to installing a gem to solve this if it can't be fixed with a setting.
Rails.application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# In the development environment your application's code is reloaded on
# every request. This slows down response time but is perfect for development
# since you don't have to restart the web server when you make code changes.
config.cache_classes = false
# Do not eager load code on boot.
config.eager_load = false
# Show full error reports.
config.consider_all_requests_local = true
config.file_watcher = ActiveSupport::FileUpdateChecker
# Enable/disable caching. By default caching is disabled.
# Run rails dev:cache to toggle caching.
if Rails.root.join('tmp', 'caching-dev.txt').exist?
config.action_controller.perform_caching = true
config.cache_store = :memory_store
config.public_file_server.headers = {
'Cache-Control' => "public, max-age=#{2.days.to_i}"
}
else
config.action_controller.perform_caching = false
config.cache_store = :null_store
end
# Store uploaded files on the local file system (see config/storage.yml for options)
config.active_storage.service = :local
# Don't care if the mailer can't send.
config.action_mailer.raise_delivery_errors = false
config.action_mailer.perform_caching = false
# Print deprecation notices to the Rails logger.
config.active_support.deprecation = :log
# Raise an error on page load if there are pending migrations.
config.active_record.migration_error = :page_load
# Highlight code that triggered database queries in logs.
config.active_record.verbose_query_logs = true
# Add devide default mailer url
config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
# Raises error for missing translations
# config.action_view.raise_on_missing_translations = true
# Use an evented file watcher to asynchronously detect changes in source code,
# routes, locales, etc. This feature depends on the listen gem.
config.file_watcher = ActiveSupport::EventedFileUpdateChecker
end

Answer 1

It's not rails who caches, it's your browser.
Either you explicitly set
config.public_file_server.headers = {
'Cache-Control' => "no-cache"
}
(and clean your browser cache, who has all old and valid versions of your files), or you disable browser cache completely.