Okta Node.js OIDC Middleware

The `@okta/oidc-middleware` package provides an OpenID Connect middleware for Express.js applications, simplifying the integration of Okta's authorization code flow. It handles redirecting users to Okta for authentication, processing the callback, and establishing a local session to store user context. The library currently maintains a stable major version series of 2.x, with the latest release being 4.2.0, following semantic versioning and Okta's library version policy. A key differentiator is its seamless integration with Express, managing OIDC complexities like token exchange and session maintenance, while relying on `express-session` for local session storage. It's designed to quickly enable secure authentication for Node.js web applications, abstracting away much of the underlying OIDC protocol details.