Update docs with info about allowed files

[mattstratton]

No description provided.

[phrawzty]

Allowed files such as? (Conversely, verboten files such as?)

Edit: Oh, do you mean like this? Yeah. 😕

[phrawzty]

Seriously though, what sort of general statements can we make here?

• File size limit?
• List of acceptable file types?
• "Common sense" guidelines?

[mattstratton]

I would say we should set something like this:

• Do not upload presentations, artifacts from your event, etc. Either link to the preso on Speakerdeck/Slideshare from the presenter, or even better, create a Speakerdeck account for your event and put the presos there.
• Small, web images are fine (logos, etc). If you have high-resolution versions of your logo to share with others, please do not host them on the devopsdays-web repo.
• It is acceptable to add in a single PDF for your sponsor prospectus if you desire (in /static/events/YYYY-city), but please keep this file under 3 MB. It is better to host it on Google Drive or something similar, and then link to it from your site.