herokuへのデプロイをしてブラウザに「We're sorry, but something went wrong.」が表示されたので、「heroku run rails db:migrate」を実行しエラーを解消しようとしましたが、何も変化はないです。railsで実装したサイトをheroku上に表示させたいです。
「heroku logs --tail」を実行し、ログの中にエラー原因がないか探ってみましたが、まだ読み方がわからないので特定できない状態です。
どなたかご教授いただければ幸いです。よろしくお願いします。

% heroku logs --tail

# 省略(下の方の最新情報だけにしました。)

2021-01-26T09:27:14.130369+00:00 heroku[router]: at=info method=GET path="/" host=blooming-earth-90741.herokuapp.com request_id=ca22c9ef-5841-4406-8935-b42c3cd97718 fwd="60.151.23.213" dyno=web.1 connect=1ms service=151ms status=500 bytes=1827 protocol=https
2021-01-26T09:30:21.913263+00:00 app[api]: Starting process with command `rails db:migrate` by user ryun19901208hk@yahoo.co.jp
2021-01-26T09:30:30.512477+00:00 heroku[run.6124]: State changed from starting to up
2021-01-26T09:30:30.989902+00:00 heroku[run.6124]: Awaiting client
2021-01-26T09:30:31.020719+00:00 heroku[run.6124]: Starting process with command `rails db:migrate`
2021-01-26T09:30:45.857557+00:00 heroku[run.6124]: Process exited with status 0
2021-01-26T09:30:45.897420+00:00 heroku[run.6124]: State changed from up to complete
2021-01-26T09:30:55.413674+00:00 app[web.1]: I, [2021-01-26T09:30:55.413546 #4]  INFO -- : [a248307a-8fe9-4521-ad33-8a5c7e05c012] Started GET "/" for 60.151.23.213 at 2021-01-26 09:30:55 +0000
2021-01-26T09:30:55.414683+00:00 app[web.1]: I, [2021-01-26T09:30:55.414612 #4]  INFO -- : [a248307a-8fe9-4521-ad33-8a5c7e05c012] Processing by NewsController#index as HTML
2021-01-26T09:30:55.483201+00:00 app[web.1]: I, [2021-01-26T09:30:55.483051 #4]  INFO -- : [a248307a-8fe9-4521-ad33-8a5c7e05c012]   Rendering news/index.html.erb within layouts/application
2021-01-26T09:30:55.485005+00:00 app[web.1]: I, [2021-01-26T09:30:55.484910 #4]  INFO -- : [a248307a-8fe9-4521-ad33-8a5c7e05c012]   Rendered news/index.html.erb within layouts/application (Duration: 1.6ms | Allocations: 496)
2021-01-26T09:30:55.485231+00:00 app[web.1]: I, [2021-01-26T09:30:55.485149 #4]  INFO -- : [a248307a-8fe9-4521-ad33-8a5c7e05c012] Completed 500 Internal Server Error in 70ms (Allocations: 1425)
2021-01-26T09:30:55.491118+00:00 app[web.1]: F, [2021-01-26T09:30:55.490988 #4] FATAL -- : [a248307a-8fe9-4521-ad33-8a5c7e05c012]
2021-01-26T09:30:55.491120+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012] ActionView::Template::Error (undefined method `each' for nil:NilClass):
2021-01-26T09:30:55.491120+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]      5:     <p class="font">Powered by <a href="https://newsapi.org", class="btn">News API</a></p>
2021-01-26T09:30:55.491122+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]      6:   </header>
2021-01-26T09:30:55.491122+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]      7:   <div class="articles">
2021-01-26T09:30:55.491123+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]      8:     <% @articles["articles"].each do |article| %>
2021-01-26T09:30:55.491123+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]      9:       <div class="article">
2021-01-26T09:30:55.491124+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]     10:         <div class="title">
2021-01-26T09:30:55.491124+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]     11:           <%= link_to article["title"], article["url"] %>
2021-01-26T09:30:55.491125+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012]
2021-01-26T09:30:55.491125+00:00 app[web.1]: [a248307a-8fe9-4521-ad33-8a5c7e05c012] app/views/news/index.html.erb:8
2021-01-26T09:30:55.497168+00:00 heroku[router]: at=info method=GET path="/" host=blooming-earth-90741.herokuapp.com request_id=a248307a-8fe9-4521-ad33-8a5c7e05c012 fwd="60.151.23.213" dyno=web.1 connect=6ms service=90ms status=500 bytes=1827 protocol=https

試したこと

下記URLの例を参考にしてみました。

【初心者向け】railsアプリをherokuを使って確実にデプロイする方法【決定版】
https://qiita.com/kazukimatsumoto/items/a0daa7281a3948701c39

Heroku500内部サーバーエラー
https://stackoverflow.com/questions/9017668/heroku-500-internal-server-error

VSコード

app/controllers/news_controller.rb

class NewsController < ApplicationController
  require "open-uri"
    def index
        news_api_key = ENV["NEWS_API_KEY"]
        uri = URI.parse("http://newsapi.org/v2/top-headlines?country=jp&apiKey=#{news_api_key}")
        json = Net::HTTP.get(uri)
        @articles = JSON.parse(json)
    end
end

app/vews/news/index.html.erb

<main class="main">
  <div class="inner">
  </div>
  <header>
    <p class="font">Powered by <a href="https://newsapi.org", class="btn">News API</a></p>
  </header>
  <div class="articles">
    <% @articles["articles"].each do |article| %>
      <div class="article">
        <div class="title">
          <%= link_to article["title"], article["url"] %>
        </div>
        <div class="wrapper">
          <div class="date">
            <%= article["publishedAt"] %>
          </div>
          <div class="source">
            <%= article["source"]["name"]%>
          </div>
          <div class="image">
            <%= image_tag article["urlToImage"] || 'hc-web-2018-news-1-sml-card.jpg.jpg', :size =>'240x160' %>
          </div>
          <div class="content">
            <%= article["description"] %>
          </div >
        </div>
      </div>
    <% end %>
  </div>
</main>

hoshi-takanori

2021/01/26 15:09

app/views/news/index.html.erb の 8 行目に問題があると言ってますね。 ActionView::Template::Error (undefined method `each' for nil:NilClass): 8: <% @articles["articles"].each do |article| %>