HELP - Error: UnhandledIoError(Os { code: 2, kind: NotFound, message: "No such file or directory" })

I was able to resolve this issue from

  • destroy app, db, builder
  • remove fly.toml/Dockerfile
  • run mix phx.gen.release --docker --ecto

release was successful and now can execute
flyctl deploy
and it worked. Thanks: kernel panic when deploying app