Flyctl deploy fails setting up Kernel: not syncing: Attempted to kill init! exitcode=0x00000100

Question

I am getting the following errors while deploying an app on fly.io using flyctl deploy.

I have no idea how to solve them or how to troubleshoot them.

Explanation Explanation Explanation

fly.toml:

# fly.toml file generated for julius-goddard-full-stack-open-pokedex3 on 2022-12-22T15:06:25Z

app = "julius-goddard-full-stack-open-pokedex3"
kill_signal = "SIGINT"
kill_timeout = 5
processes = []

[build]
  image = "flyio/hellofly:latest"

[env]

[deploy]
  release_command = "npm run build"

[processes]
  app = "node app.js"

[experimental]
  allowed_public_ports = []
  auto_rollback = true

[[services]]
  http_checks = []
  internal_port = 8080
  processes = ["app"]
  protocol = "tcp"
  script_checks = []
  [services.concurrency]
    hard_limit = 25
    soft_limit = 20
    type = "connections"

  [[services.ports]]
    force_https = true
    handlers = ["http"]
    port = 80

  [[services.ports]]
    handlers = ["tls", "http"]
    port = 443

  [[services.tcp_checks]]
    grace_period = "1s"
    interval = "15s"
    restart_limit = 0
    timeout = "2

s"