Rails/Heroku - How to fix error node_modules/node-sass: Command failed.

rails_heroku_how_to_fix_error_node_modules_node_sass_command_failed.md

• Move to the trash these files: node_module folder, package-lock.json and yarn.lock;
• In your package.json upgrade webpacker to 5.3.0;
• Run yarn install in your console

That's it!

In case you don't have the start script in your package.json, you can add:

"scripts": {
  "start": "webpack-dev-server"
}
```

Env: Rails 6