chore: update assets

Merge pull request #31 from luhmann/GH-29-recreate-swipe-gestures-pwa

#29: add back/forward-swipe-gestures for pwa

chore: enable legacy-apple-icons

Merge pull request #28 from luhmann/GH-10-style-404

#10: give minimal styling to 404 page

Merge pull request #27 from luhmann/GH-26-enable-pwa

#26: add offline-capabilities

Merge pull request #25 from luhmann/GH-23-fix-noscript-images

#23: apply consistent styles across images and noscript-fallbacks

Merge pull request #22 from luhmann/GH-21-fix-flash-of-404

#21: create pages for each image

fix: routing for generated page with new urls