Create marketing cards for Trainings

First draft is ready for review.

added remaining TODOS

Uploaded all JPEG to the appropriate Social Media Card field.

volkswagenchick → credited hot_sauce → .

crediting Adam for updating eventbrite.

Marking as fixed for now. We do have to remember to go back and fix Sal's node once he creates a profile

Automatically closed - issue fixed for 2 weeks with no activity.