How to deploy an application with Node js, Express, Mysql database and Sequelize ORM on Railway?

I have that do the deploy of my application on RAILWAY and I used the deploy from Github repo. Happened an fail and in “DETAILS” appeared this:

Save this in a file called railway.json to codify your deployments config.

{
  "$schema": "https://railway.app/railway.schema.json",
  "build": {
    "builder": "NIXPACKS"
  },
  "deploy": {
    "restartPolicyType": "ON_FAILURE",
    "restartPolicyMaxRetries": 10
  }
}

In “BUILD LOGS” this:

Sticky cache enabled
==============
Using Nixpacks
==============
context: fd1f6938e902633a121a000c30b076e7
Nixpacks build failed
 
 
Nixpacks was unable to generate a build plan for this app.
Please check the documentation for supported languages: https://nixpacks.com
 
The contents of the app directory are:
 
README.md
.gitignore
api/
client/

In “DEPLOY LOGS” this:

No deployment logs. All output sent to stdout will be displayed here

I tried Save the code below in a file called railway.json, but, no worked.

{
  "$schema": "https://railway.app/railway.schema.json",
  "build": {
    "builder": "NIXPACKS"
  },
  "deploy": {
    "restartPolicyType": "ON_FAILURE",
    "restartPolicyMaxRetries": 10
  }
}

How resolv this problem?

The repo my github