How to install a package?

Question

I have this `railway.json`:
```json
{
  "$schema": "https://railway.com/railway.schema.json",
  "deploy": {
    "aptPackages": ["git"],
    "overlapSeconds": 0,
    "drainingSeconds": 0,
    "startCommand": "bun start",
    "restartPolicyType": "ON_FAILURE",
    "restartPolicyMaxRetries": 5,
    "healthcheckPath": "/health",
    "healthcheckTimeout": 100,
    "multiRegionConfig": {
      "europe-west4-drams3a": {
        "numReplicas": 1
      }
    }
  }
}
```

But i still get: 
> Git binary not found at /usr/bin/git: Command failed: /usr/bin/git --version
> /bin/sh: 1: /usr/bin/git: not found

I also tried just `git` and `/bin/git`, it's not there. How do I install external package?