docs: public static int getSystemPort(String portIdentifier) {
          int defaultPort = 0;
  
          if (portIdentifier.compareTo(Constants.SYS_API_PORT) == 0) {
              defaultPort = Constants.DEFAULT_API_PORT;
          } else if (portIdentifier.compareTo(Constants.SYS_DB_PORT) == 0) {
              defaultPort = Constants.DEFAULT_DB_PORT;
          } else if (portIdentifier.compareTo(Constants.SYS_FWD_PORT) == 0) {
              defaultPort = Constants.DEFAULT_FWD_PORT;
          } else if (portIdentifier.compareTo(Constants.SYS_HTTP_PORT) == 0) {
              defaultPort = Constants.DEFAULT_HTTP_PORT;
          } else if (portIdentifier.compareTo(Constants.SYS_HTTPS_PORT) == 0) {
              defaultPort = Constants.DEFAULT_HTTPS_PORT;
          } else {
              return defaultPort;
          }
  
          String portStr = System.getenv(portIdentifier);
          return (portStr == null || portStr.isEmpty()) ? defaultPort : Integer.valueOf(portStr);
      }