1.  `envs/*` are lists of variables made with bash syntax. A user must set a
    `TFCI` env param pointing to a list of `env` files.
2.  `utilities/setup.sh`, initialized by all top-level scripts, reads and sets
    values from those `TFCI` paths.
    -   `set -a` / `set -o allexport` exports the variables from `env` files so
        all scripts can use them.
    -   `utilities/setup_docker.sh` creates a container called `tf` with all

Certificates](#generate-use-self-signed-keys-certificates) or generate them with [Let's Encrypt](https://letsencrypt.org) using these instructions: [Generate Let's Encrypt certificate using Certbot for MinIO](https://min.io/docs/minio/linux/integrations/generate-lets-encrypt-certificate-using-certbot-for-minio.html). For more about TLS and certificates in MinIO, see the [Network Encryption documentation](https://min.io/docs/minio/kubernetes/upstream/operations/network-encryption.html).

Copy the existing...

- `outputToken` – A token added to the response headers when the Lambda function returns the transformed object. This is used by MinIO to verify the incoming response validity.

Lets start the lamdba handler.

```
python lambda_handler.py
 * Serving Flask app 'webhook'
 * Debug mode: off