This change implements yamllint and adjusts all yaml files to abide by our linting setup. This excludes config.template.yml as this will be done in an alternate commit.
* [FEATURE] Docker simplification and configuration generation
The Authelia binary now will attempt to generate configuration based on the latest template assuming that the config location specified on startup does not exist. If a file based backend is selected and the backend cannot be found similarly it will generate a `user_database.yml` based a template.
This will allow more seamless bootstrapping of an environment no matter the deployment method.
We have also squashed the Docker volume requirement down to just `/config` thus removing the requirement for `/var/lib/authelia` this is primarily in attempts to simplify the Docker deployment.
Users with the old volume mappings have two options:
1. Change their mappings to conform to `/config`
2. Change the container entrypoint from `authelia --config /config/configuration.yml` to their old mapping
* Adjust paths relative to `/etc/authelia` and simplify to single volume for compose
* Add generation for file backend based user database
* Refactor Docker volumes and paths to /config
* Refactor Docker WORKDIR to /app
* Fix integration tests
* Update BREAKING.md for v4.20.0
* Run go mod tidy
* Fix log_file_path in miscellaneous.md docs
* Generate config and userdb with 0600 permissions
* Fix log_file_path in config.template.yml
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`
