[Snyk] Security upgrade webpack-dev-server from 4.15.2 to 5.1.0

[Eric-Guo]

Snyk has created this PR to fix 1 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• package.json

Note for zero-installs users

If you are using the Yarn feature zero-installs that was introduced in Yarn V2, note that this PR does not update the .yarn/cache/ directory meaning this code cannot be pulled and immediately developed on as one would expect for a zero-install project - you will need to run yarn to update the contents of the ./yarn/cache directory.
If you are not using zero-install you can ignore this as your flow should likely be unchanged.

⚠️ Warning

Failed to update the yarn.lock, please update manually before merging.

Vulnerabilities that will be fixed with an upgrade:

	Issue
	Inefficient Algorithmic Complexity SNYK-JS-BRACEEXPANSION-17706650

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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[Eric-Guo]

This is a major version upgrade from v4 to v5 that introduces significant breaking changes requiring configuration updates.

Key Breaking Changes:

• Environment Requirements: Support for older versions of Node.js has been dropped. The new minimum required versions are:

  • Node.js: 18.12.0 or newer. [1, 2]
  • webpack: 5.0.0 or newer. [1, 2]
  • webpack-cli: 5.0.0 or newer. [1]

• Configuration (devServer options):

  • HTTPS/HTTP2: The https and http2 options have been removed. You must now use the new server option to configure HTTPS, HTTP/2, and custom certificates. [1]
  • Middleware: The onBeforeSetupMiddleware and onAfterSetupMiddleware options have been replaced by the setupMiddlewares option. [1]
  • Proxy: The proxy option no longer accepts an object. It must now be an array of proxy objects. [1]

Recommendation:
Developers must review their webpack.config.js file and update the devServer configuration according to the official migration guide to ensure compatibility. The most common changes will involve how HTTPS and custom middleware are configured.

Source: Official Migration Guide [1]

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

[Copilot]

Pull request overview

This PR aims to remediate a Snyk-reported vulnerability by upgrading the webpack-dev-server dependency used by the Rails + Shakapacker frontend build pipeline.

Changes:

• Bumps webpack-dev-server from ^4.15.2 to ^5.1.0 in package.json.

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