我在html中运行的图像在本地工作，但并非全部通过heroku部署

Question

图像保存为.jpg。

背景图片有效，即使它不是我想要的图像。 此外，网站上还有两张图片也没有显示。 一切都在当地很好。

thanks. 
<div id="container">
<div id="services" class="row">
  <div id="Srvc" class="col-md-6">
    <img class="imgCircle" src="assests/images/front-sun.jpg" alt="Finished Lawn">
    <h3>Landscape Design and Maintenance</h3>
    <p>generic para..Never worry about your front or backyard looking as beautiful as the first day it was installed when  is in charge of your yard care and maintenance. Get a free yard care estimate today</p>
  </div>
  <div id="Srvc" class="col-md-6">
     <img class="imgCircle" src="assests/images/wall.jpg" alt="Retaining Wall">
    <h3>Masonry Solutions</h3>
    <p> generic para...Never worry about your front or backyard looking as beautiful as the first day it was installed when is in charge of your yard care and maintenance. Get a free yard care estimate today</p>
  </div>

</div>