SE Security missing doc in Main.java

[pfmackin]

The following is WebSecurity setup is missing from Main.java

import io.helidon.security.integration.webserver.WebSecurity;

    return Routing.builder()
            .register(JsonSupport.create())
            .register(WebSecurity.create(config.get("security")))
            .register(health)                   // Health at "/health"
            .register(metrics)                  // Metrics at "/metrics"
            .register("/greet", greetService)
            .build();