Traefik can be configured with both YAML and TOML, this transitioned the 
current TOML configuration to a YAML configuration.

- I added some comments while learning about the configuration as well.
- I made the log level become DEBUG if debug.enabled was configured
- We now explicitly set the ACME server to use and avoids using 
Traefik's default value.

From the [RFC documentation](https://tools.ietf.org/html/rfc6797#section-7.2)
it seems like we "SHOULD" make the http->https redirect permanent (301)
instead of a temporary redirect (302), and that we "MUST NOT" include an
STS header in our redirect response over HTTP which is insecure.

A preload value in the STS header indicates that the webserver wants the
browser to add this website to a list which should be considered to be
HTTPS only that can influence other browsers that haven't even visisted
this webserver before.

One can also manually add oneself to such list from
https://hstspreload.org/ if one complies with their requirements, of
which one is that a preload value in the STS header is specified.