herokuでRailsアプリのスタイルが効かない

Question

前提・実現したいこと

簡単なRailsアプリをherokuにデプロイする。
=>デプロイはできるがbootstrapやcssが効かない。

↓app/assets/javascript/application.js↓

//= require rails-ujs
//= require jquery
//= require bootstrap-sprockets
//= require activestorage
//= require turbolinks
//= require_tree .

↓app/assets/stylesheet/application.scss↓

@import "bootstrap-sprockets";
@import "bootstrap";

.hogehoge {
  something...
}

発生している問題・エラーメッセージ

開発環境では正しく表示できるが、heroku上でスタイルがうまく当たらない

該当のソースコード

↓herokuデプロイ時のログ↓

Counting objects: 5, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (5/5), done.
Writing objects: 100% (5/5), 498 bytes | 498.00 KiB/s, done.
Total 5 (delta 3), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.4.0
remote: -----> Installing dependencies using bundler 1.15.2
remote:        Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
remote:        Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.17.2). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote:        Fetching gem metadata from https://rubygems.org/......
......
remote:        Bundle completed (3.53s)
...
remote: -----> Installing node-v10.14.1-linux-x64
remote: -----> Detecting rake tasks
remote: -----> Preparing app for Rails asset pipeline
remote:        Running: rake assets:precompile
remote:        Yarn executable was not detected in the system.
remote:        Download Yarn at https://yarnpkg.com/en/docs/install
remote:        Asset precompilation completed (1.83s)
remote:        Cleaning assets
remote:        Running: rake assets:clean
remote: -----> Detecting rails configuration
remote: 
remote: ###### WARNING:
remote: 
remote:        You set your `config.active_storage.service` to :local in production.
remote:        If you are uploading files to this app, they will not persist after the ...
remote:        
remote: 
remote: ###### WARNING:
remote: 
remote:        We detected that some binary dependencies required to
...
remote:        
remote: 
remote: ###### WARNING:
remote: 
remote:        No Procfile detected, using the default web server.
...
remote: 
remote: 
remote: -----> Discovering process types
remote:        Procfile declares types     -> (none)
remote:        Default types for buildpack -> console, rake, web
remote: 
remote: -----> Compressing...
remote:        Done: 61.7M
remote: -----> Launching...
remote:        Released v19
remote:        https://myapp/ deployed to Heroku
remote: 
remote: Verifying deploy... done.

試したこと

app/config/initializer/assets.rbに以下を追記

Rails.application.config.assets.precompile += %w( *.js *application.css )

補足情報（FW/ツールのバージョンなど）

Rails-v => 5.2.2
Ruby-v => 2.4.0

Answer 1

ローカルでできていてHerokuでできないのでしたら最新のコミットができているか確認してみてください。