In Drupal 8 how do I get the image path from a twig node template? I'm working with Drupal 8 and twig 

I created a Drupal content type called hero. It contains a title, body copy and an image. I'm overwriting node.html.twig for this content type but am having trouble accessing the image source to generate html I need to. 

&lt;div {{ attributes.addClass(classes) }} style="background-image: url(/img/site/about/about_hero_banner.jpg);"&gt;
      &lt;div class="row"&gt;
        &lt;div class="col-sm-7"&gt;
          &lt;div class="copy"&gt;
            &lt;h1&gt;
              Headline
            &lt;/h1&gt;
            &lt;p&gt;
              Subhead Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ex, sed voluptatum fugit ipsa animi quos nobis?
            &lt;/p&gt;
          &lt;/div&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;


I can access the Headline and title with the code below but I don't want to load the image file I want only want the image path (source). 

{{ content.body }}
{{ content.field_headline }}
{{ content.field_hero_image }}


How do I get the image file path from in my node template from 
{{ content.field_hero_image }}? How do I access the attributes of content.field_hero_image?

I've looked at image.html.twig and see 

&lt;img{{ attributes }} /&gt;


So I know it's in the attributes, but don't know how to access the attributes from the node template.
Ok, after writing this question a similar one showed up and I think I found the solution:

{{ file_url(node.field_hero_image.entity.fileuri) }}