Jon-img w środku ekranu
<div class="vertical-center">
<div class="center">
<ion-img src="imgename" class="ion-align-self-end"></ion-img>
</div>
</div>
add this in css file
.vertical-center{
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
BlueMoon