github.com/quickfeed/quickfeed@v0.0.0-20240507093252-ed8ca812a09c/public/assets/img (about) Aplus2.png GitHub-Mark-120px-plus.png android-chrome-192x192.png android-chrome-512x512.png apple-touch-icon.png favicon-16x16.png favicon-32x32.png intro1.png intro2.png intro3.png intro4.png overlapping-arrows.png