If the configuration yaml is poorly indented or special values are not appropriately escaped Authelia attempts to load said configuration and fails.
This attempts to unmarshal the config into an empty interface to catch and warn on malformed yaml.
Using the example from issue https://github.com/authelia/authelia/issues/1053#issuecomment-634791662
```yaml
host: 0.0.0.0
port: 9091
log_level: debug
jwt_secret: RUtG9TnbXrOl1XLLmDgySw1DGgx9QcrtepIf1uDDBlBVKFZxkVBruYKBi32PvaU
default_redirection_url: example.com
totp:
issuer: example.com
period: 30
skew: 1
authentication_backend:
file:
path: /etc/authelia/users_database.yml
access_control:
default_policy: deny
rules:
- domain: example.com
policy: bypass
- domain: "*.example.com"
policy: one_factor
session:
name: authelia_session
secret: TVPMIcDFbBwhnW3kLJzKhdjeHhtqisr7m28FgRY8oLh2A4lwuV2jV2ZGdGbh4aa
expiration: 3600
inactivity: 300
domain: example.com
regulation:
max_retries: 3
find_time: 120
ban_time: 300
storage:
mysql:
host: example.com
port: 3306
database: authelia
username: authelia
password: example.com
notifier:
smtp:
username: example.com
password: example.com
host: smtp.gmail.com
port: 465
sender: example.com
```
We would actually get a more meaningful error which helps pinpoint the issue:
`Error malformed yaml: line 23: did not find expected alphabetic or numeric character`
Amir Zarrinkafsh