Elixir Phoenix app failing health check

[hayatu89]

I am trying out kamal on Elixir and I seem to hit a roadblock. When I run kamal setup it builds the image and deploy to the server, but the container stays at the starting state all through and then stops afterward. Here are the logs:

INFO [a6492df7] Finished in 0.489 seconds with exit status 0 (successful).
 ERROR warning: variable "host" is unused (if the variable is not meant to be used, prefix it with an underscore)
  /app/releases/0.1.0/runtime.exs:54

09:23:59.562 [info] Migrations already up
warning: variable "host" is unused (if the variable is not meant to be used, prefix it with an underscore)
  /app/releases/0.1.0/runtime.exs:54

09:24:01.520 [info] Running KamalWeb.Endpoint with cowboy 2.10.0 at :::3000 (http)
09:24:01.524 [info] Access KamalWeb.Endpoint at http://localhost:3000
 ERROR {
  "Status": "starting",
  "FailingStreak": 0,
  "Log": [

  ]
}

can you someone help me take a look?