• (Amazed at how the styling is similar to the original website)
• Applying container inside row looks strange. Rows should be inside containers.
• There are quotes where there are not supposed to be.

Things might help on code reviews:

• Some code reviewers are kinda of picky with things. (The HTML indentation might be picked up by some code reviewers)

• Bootstrap has a hierarchy (First of all, container. After that, nest as many rows as you want. Inside the rows, you can have as many columns as you may want).

• You might face a bootstrap expert on your code review and that would be bad.

• The code looks great until line thirty (30), but then the hightlight breaks after that. Line 33 has a different color.

• Using too much custom CSS for organizing the page and leaving bootstrap aside (kinda defeats the purpose of the project).

• It's possible to use bootstrap cards on some articles.

•  line 20: columns nested in rows
  

•  line 22, 26 and 28: same level columns, but the three adds to 18 (not 12)
  

•  line 102: row inside container
  

•  line 103: great use of order for the elements
  

•  Take a look on nesting in container. Position sticky part is missing you can achieve.
  

•  formatting on html should be improve.
  

. Good project
. Refactor code before pushing
.Issue on line 21, index.html (branch headerNav-branch): HTML elements that are of the classes col-, col-sm-, col-md-, col-lg- or col-xl-* must be direct children of a parent element that is of the class "row".

Example of correct use of bootstrap's grid of twelve columns sistem:

<div class="row"> <!-- "row" must have "col-*-*" as children! -->
<div class="col-6">Column A</div> <!-- "col-*-*" must have row as parent! -->
<div class="col-6">Column B</div>
</div>

. It looks like that have misunderstood the role of the class "flex-row" of bootstrap. "flex-row" does not make a div element to become a logical row of bootstrap. It's simply a shorthand for adding this rule to the styling of the element: "flex-flow: row".
.look at the search input not working(onclick)
.start with small screens scaling up to big screens