Unhandled exception in spawn: Unable to get info for "public/dist/cvue.main.js"

[noahlh]

On very first load (before there's a /build directory). Doesn't seem to cause an actual issue, but should be fixed nonetheless.

Unhandled exception in spawn: Unable to get info for "public/dist/cvue.main.js": No such file or directory (Errno)
  from /usr/local/Cellar/crystal/0.27.0/src/file.cr:122:37 in 'info'
  from /usr/local/Cellar/crystal/0.27.0/src/file.cr:121:3 in 'info'
  from lib/amber/src/amber/support/client_reload.cr:47:7 in 'get_timestamp'
  from lib/amber/src/amber/support/client_reload.cr:53:9 in 'scan_files'
  from lib/amber/src/amber/support/client_reload.cr:16:9 in 'run'
  from lib/amber/src/amber/support/client_reload.cr:11:7 in '->'
  from /usr/local/Cellar/crystal/0.27.0/src/fiber.cr:255:3 in 'run'
  from /usr/local/Cellar/crystal/0.27.0/src/fiber.cr:75:34 in '->'