Apply a context configurator to result of web/run, before web/server is called. This is currently only used for connecting Immutant WebSocket support.

Standard options :port 8080 :host localhost

Undertow tuning options (defaults depend on available resources) :io-threads :worker-threads :buffer-size :buffers-per-region :direct-buffers?

SSL-related options :ssl-port :ssl-context :key-managers :trust-managers :keystore (either file path or KeyStore) :key-password :truststore (either file path or KeyStore) :trust-password :client-auth (either :want or :need)