Ionic after build image not work

Ionic Framework ionic-v3
1

if I run my project locally, the images appear … after I give the build, it does not appear the image can anyone help me?

    <ion-slide class="slide-3"   style="background-image: url(/assets/img/app_03.svg)">
      <ion-row class="intro-image-row">
        <ion-col center width-64 no-padding>
        </ion-col>
      </ion-row>
      <h2 class="main-title">{{'GET_READY!' | translate}}</h2>
      <p class="intro-text">
        Soon your app will look and feel awesome!
      </p>
    </ion-slide>```
BEFORE I BUILD  https://imgur.com/a/WBd4KrF 
AFTER I BUILD https://imgur.com/a/yx6N3Rz
2

Try to change the image url to -> “…/assets/img/app_03.svg”

3

Make sure you don’t have a mixture of upper/lower characters in the file name - on a pc it does not matter but on a device it can be case sensitive.
Also not sure about the file address - this is one I use:

background-image:url(‘…/assets/meta/images/tip.png’)

Notice the address is in quotes and that it starts with two leading dots.