Discourseで二重Nginxエラーが発生しました：`discourse-common/lib/raw-handlebars`からインポートされたモジュール`handlebars`が見つかりません

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And it doesn’t matter which one you use? And they are running the same image? That is perplexing.

The only advantage I can see to running two containers like that on the same host is to make it possible to do zero-downtime upgrades. Since you’re not upgrading very often, it seems that you’ve got unnecessary complexity.

You need sometihng like this in your web_only.yml:

after_bundle_exec:
  - replace:
    filename: /etc/nginx/conf.d/discourse.conf
    from: "types {"
    to: |
      set_real_ip_from 172.16.0.0/12;
      set_real_ip_from 10.0.0.0/8;
      real_ip_recursive on;
      real_ip_header X-Forwarded-For;
      types {