Image links are broken on 2020-03-20-getting-started.md

[pglevy]

Love this project! Came across it browsing the Inclusive Design 24 sessions...

To reproduce: start on readme.md and click "I'm not a developer" link.
Expected result: images rendered on page.

Will submit a quick PR. Please excuse any breach of contribution etiquette. I am not a developer.

[JackHowa]

noticed this as well @maxboeck