Feedback for SAMIoT 2020 Conference

Philippe needed the site to be live. I decided to commit the PR and create a separate issue with my feedback:

• content/2020/sam-iot/images/brain_iot_logo.jpg is 400kb please optimize for web!
• I am fine with adding some custom styles to the less file but let's make sure these new classes are re-usable.

In this situation, I am referring to ".technical-topics-notes".

For example, is only makes sense to set the links to white if .technical-topics-notes is used within .featured-section-row-dark-bg.

If for some reason, we cant refactor the code to be re-usable, I would like to see a comment in the code regarding where we are using this class to make sure we don't remove it in the future.

Finally, should we create a shortcode for the technical-topics-notes section?