Ionic avatar cant put the notification icon - css

Question

I'm used my university project for Ionic -3 I'm try to create sample image as
Avatar to set of the small icon, but its cant do that correctly , any one know how to make correctly like this
My code sample
my code
<ion-item>
<ion-avatar item-start>
<img src="assets/imgs/user.png">
<div>
<button id="notification-button" ion-button clear>
<ion-icon name="notifications">
</ion-icon>
</button>
</div>
</ion-avatar>
<h2>Woody</h2>
<p>This town ain't big enough for the two of us!</p>
<ion-note item-end>3:43 pm</ion-note>
</ion-item>
css
#notification-button {
position: relative;
width: 42px;
top:1px;
right: 1px;
overflow: visible!important;
}
#notifications-badge {
background-color: red;
position: absolute;
top: -3px;
right: -3px;
border-radius: 100%;
}

Answer 1

Underneath the answer, Before I saw your code...
I don't have ion stuff, but I can help you with the css, is this kinda what you need?
position: relative; on the .ion-item and to get the small button on its right place, just put this position: absolute; right: -5px; bottom: -5px; in the button
.ion-item{
position: relative;
height: 100px;
width: 100px;
}
.ion-avatar{
border-radius: 50%;
background-color: tomato;
box-shadow: 0 0 4px 3px #ccc;
height: 100%;
width: 100%;
}
button{
position: absolute;
right: -5px;
bottom: -5px;
height: 40px;
width: 40px;
border-radius: 50%;
background-color: blue;
border: gray 1px solid;
cursor: pointer;
color: white;
}
<div class="ion-item">
<div class="ion-avatar">
<div>
<button id="notification-button">
<div class="ion-icon">
!!!
</div>
</button>
</div>
</div>
<h2>Woody</h2>
<p>This town ain't big enough for the two of us!</p>
<p>3:43 pm<p>
</div>
update
When I played with chrome web tools a bit, I found this to get the button to the point you wanted it.
#notification-button[_ngcontent-c0] {
position: absolute;
width: 42px;
top: 25px;
left: 30px;
overflow: visible !important;
}
changed your position: relative; to position: absolute; and changed the top and right, I'm not sure if your working responsive. But take a look if this helps. Otherwise, I know another good solution.