title: Wrong "Generated server url" in springdoc-openapi-ui (Swagger UI) deployed behind proxy
body: <p>Spring Boot 2.2 application with springdoc-openapi-ui (Swagger UI) runs HTTP port.
  The application is deployed to Kubernetes with Ingress routing HTTPS requests from outside the cluster to the service.</p>
  
  <p>In this case Swagger UI available at <code>https://example.com/api/swagger-ui.html</code> has wrong "Generated server url" - <code>http://example.com/api</code>. While it should be <code>https://example.com/api</code>.</p>
  
  <p>While Swagger UI is accessed by HTTPS, the generated server URL still uses HTTP.</p>