html + css add text in the picture

html  

<view class="container">
    <image class="" src="{{book.image}}"></image>
    <view class="description">
        <text class="title">{{book.title}}</text>
        <text class="author">{{book.author}}</text>
        <view class='foot'>
            <text class="footer">{{book.fav_nums}}  喜欢</text>
        </view>
    </view>
</view>

css 

/* component/page/index.wxss */
.container {
   display: flex;
   flex-direction: column;
   align-items: center;
   margin-top: 30rpx;
   box-shadow: 2px  2px  3px #e3e3e3e3;
   position: relative;
   width: 240rpx;
   height: 360rpx;
}
.container image{
   width: 100%;
   height: 100%;
   border-radius: 2px;
}
.description {
  width: 100%;
  position:absolute; 
  z-index:2;
  left:0;
  bottom:0;
  background-color: white;
}

Here we use the position: absolute; also set bottom: 0; left: 0; to generate absolute positioning here because we position: absolute to be effective,

Relative to the first parent element is positioned outside the static positioning so we set the relative positioning element is the parent