Deploy to Railway documentation outdated

[melissa-hale]

🐞 Describe the bug

Ackee Docs describe a broken path for deploying Ackee to Railway.

📚 To Reproduce

Try to follow the Get Started > Deploy with Railway instructions

💡 Expected behavior

The Docs should be accurate to guide users to successfully deploy Ackee on Railway.

🖼️ Screenshots

⚙️ Environment

• Installation: Railway
• Ackee version: latest

📋 Additional context

n/a