| Name | Default | Required | Description |
|---|---|---|---|
| NODE_ENV | - | No | Node environment |
| APP_ID | - | Yes | GitHub App Id |
| WEBHOOK_SECRET | - | Yes | GitHub App Webhook secret |
| PRIVATE_KEY | - | Yes | GitHub App private key (base64 encoded) |
| PRIVATE_KEY_PATH | - | Yes | Path to GitHub App private key |
Note: you only need to define PRIVATE_KEY or PRIVATE_KEY_PATH.