Add an image for HWC's sharing metadata
Both for sharing to silos, as well as for Microformats2 parsers.
Via https://indieweb.org/images/b/b1/2017-hwc-80s-retro.jpg
Closes #723 (closed).
Both for sharing to silos, as well as for Microformats2 parsers.
Via https://indieweb.org/images/b/b1/2017-hwc-80s-retro.jpg
Closes #723 (closed).