OpenID Connect Discovery
How a Relying Party fetches the OpenID Provider's configuration document and public keys to bootstrap an OIDC integration.
Before a Relying Party can use OpenID Connect, it must learn the OpenID Provider's endpoint URLs, supported algorithms, and public signing keys. The discovery mechanism lets a client bootstrap this configuration automatically by fetching a well-known JSON document at <issuer>/.well-known/openid-configuration, then optionally pre-fetching the signing keys at the returned jwks_uri.