how to use container class in bootstrap code example
Example 1: bootstrap container-fluid
Use .container-fluid for a full width container, spanning the entire width of the viewport.
<div class="container-fluid">
...
</div>
Example 2: container bootstrap
<div class="container-sm">100% wide until small breakpoint</div>
<div class="container-md">100% wide until medium breakpoint</div>
<div class="container-lg">100% wide until large breakpoint</div>
<div class="container-xl">100% wide until extra large breakpoint</div>