Mobile first - QR code component

Good job! The main thing I would recommend is to make sure your code is accessible by meeting ARIA standards as well as using secure HTML. For example, using semantic tags such as <main></main> and <footer></footer> to indicate the "sections" of the page. You should also use the 'alt' attribute in the <img> tag to have an alternative text description in case the image does not load or if someone is using a screen reader. Finally, links, such as those contained in the attribution, need to have rel="noopener" to prevent the new blank tab/window from accessing the original window (through malicious code).