For setting setup the container in your theme, you can always add them under
themes/theme_dir/elements/containers/
Follow the steps to create your first container inside your theme
Create Container Template File
To define a container within your site navigate to Dashboard->Pages & Themes->Containers
Here, click on "Add Container" following by giving it a name and handle, you need to make sure that the handle name must be as same as the container PHP file inside the containers directory.
Creating containers is similar to creating templates files, inside your container PHP file you need to define
use Concrete\Core\Area\ContainerArea;
Now, you need to define container area within this template like this
$area = new ContainerArea($container, ‘container_name’);
$area->display($c);
This will add an editable area within your container.
Creating Container objects through Content XML
Containers can also be created and installed with the theme. You can find its usage inside Atomik theme documentation where you can see how you can create and assign Containers to page templates.
Adding Containers to a page
Adding containers to a page is as same as adding a block to a page.
