Error: Push.Configure should not be called more than once!

I dont really understand the configuration of how to send a notification.
I want to test the notifications on Android first.

So in my /client/main.js I've pasted the following:

import { Push } from 'meteor/raix:push';
import '/imports/startup/client';

Push.Configure({
  android: {
    senderID: MY SENDER ID,
    alert: true,
    badge: true,
    sound: true,
    vibrate: true,
    clearNotifications: true
    // icon: '',
    // iconColor: ''
  },
  // ios: {
  //   alert: true,
  //   badge: true,
  //   sound: true
  // }
});

In the root folder of my Meteor project I've created a mobile-config.js with the following code:

App.configurePlugin('phonegap-plugin-push', {
  SENDER_ID: MY SENDER ID
});

And in my /server/main.js I've got the following code:

import { Push } from 'meteor/raix:push';
import '/imports/startup/server';

Push.Configure({
  // apn: {
  //   certData: Assets.getText('apnDevCert.pem'),
  //   keyData: Assets.getText('apnDevKey.pem'),
  //   passphrase: 'xxxxxxxxx',
  //   production: true,
  //   //gateway: 'gateway.push.apple.com',
  // },
  gcm: {
    apiKey: 'MY API KEY',
    projectNumber: MY SENDER ID
  }
  // production: true,
  // 'sound' true,
  // 'badge' true,
  // 'alert' true,
  // 'vibrate' true,
  // 'sendInterval': 15000, Configurable interval between sending
  // 'sendBatchSize': 1, Configurable number of notifications to send per batch
  // 'keepNotifications': false,
//
});

But I get the error: Error: Push.Configure should not be called more than once!

What am I doing wrong?

Start with the configuration calls in /client/main.js and /server/main.js, then inspect the package entry points that implement Push.Configure. Determine why these two setup paths produce the reported error and identify the expected Android configuration flow. Done means the documented setup no longer triggers the error and Android notification configuration is unambiguous.