Serving static assets

[kiootic]

• Reuse asset gear for backing storage of static assets.
• Controller unpack archive and upload individual asset file to app asset gear, with correct cache headers.
• Path mapping is stored in static deployment route.
• Implementation limits:
  • Max path length: 256
  • Max files per deployment route: 1024
• Gateway routes to asset gear for static deployment route, according to path mapping.