Click deploy button on home page

Get DATABASE_URL from render.com (recommended) or railway.app. Read: How to get Database url?

Fill required info including DATABASE_URL & KOYEB_API_KEY, then deploy.

Bot will now start running

Get Koyeb api key from API page, type name and then click create API access token

Copy API key and go to app, service, then click three dots and tap on edit service configuration

Go to your bot number and type:
>process.env.KOYEB_API_KEY="YOUR_API_KEY" ( API key must be inside quotes ", no response will come if its success.)
After this, type:
.setvar KOYEB_API_KEY:YourKeyHere

Now you can update/setvar remotely from WhatsApp!