docs(Authelia): Update access rules documentation (#17316)

**Description**

Default access rule policy in the Authelia setup guide is currently
`one_factor`, this give access to everything to every user.
In this PR, the doc is updated to :
- recommend default policy to `deny` in the main Authelia guide and only
give full access to member of an `admin` ldap group.
- recommend having an `admin` and `user` groups in the Authelia Rules
guide with full access for `admin` users and limited access for `user`
users.

⚒️ Fixes 

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code
- [x] 📄 Doc update 

**🧪 How Has This Been Tested?**

I built the doc website locally to make sure of the following :
- formatting is ok
- screenshots works
- links works
- recommended configuration works on my setup (my setup is following
closely the others TrueCharts guides)

**📃 Notes:**


**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [x] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [x] 📄 I have made corresponding changes to the documentation
- [x] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

_Please don't blindly check all the boxes. Read them and only check
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charts/enterprise/authelia/docs/Setup-Guide.md

@@ -26,6 +26,8 @@ LLDAP is a `Stable` train chart and therefore isn't supported at the same level
 
 - Once in `LLDAP`, create a user inside the `lldap_password_manager` group and change your default `admin` password. That `lldap_password_manager` user will be used to bind to `Authelia`. I've created a user called `Steven`
 
+- Create an `admin` group and add `Steven` to it. We will allow users of this group to access the site with Authelia later in the guide.
+
 ## Setup Authelia
 
 - The setup for Authelia is very specific, and the logs won't tell you where you've messed up, but there's precise steps used to integrate `LLDAP` into `Authelia`. The info comes from the [LLDAP Authelia Docs](https://truecharts.org/charts/stable/lldap/authelia) and the upstream repo.
@@ -65,15 +67,17 @@ Check your mail provider for this, generally Gmail gives you an app specific pas
 
 ### Access Control Configuration
 
-- This section is to set rules to connect to `Authelia` and which users can go where. This is a basic general rule below where the main user (Steven) can access all the site using a wildcard
+- This section is to set rules to connect to `Authelia` and which users can go where. This is a basic general rule where users of the `admin` group (Steven) can access all the site using a wildcard.
 
-Leave the default `one_factor` unless you've setup TOTP above. Then click `Add` next to `Rules` to get the screen below
+Set the default `deny`. Then click `Add` next to `Rules` to get the screen below.
 
 ![AutheliaAccessControl](./img/AutheliaAccessControl.png)
 
 - Add your `Domain` and a `Wildcard` for your subdomains.
-- Leave policy `one_factor`
-- Click `Add Subject` and add a subject of `group:lldap_password_manager` since `Steven` is part of that group
+- Set policy to `one_factor` or `two_factor`, up to you.
+- Click `Add Subject` and add a subject of `group:admin` since `Steven` is part of that group.
+
+Please see [Authelia Rules](./authelia-rules) for more advanced rules.
 
 #### Setup Authelia Ingress
 

charts/enterprise/authelia/docs/authelia-rules.md

@@ -10,7 +10,17 @@ It is important that rules are created in the correct order in Authelia. Rules a
 
 :::
 
-All rules requiring Authelia authentication were configured with `two_factor` (2FA). If you do not want 2FA on some or all rules replace the Policy with `one_factor`
+:::note[DEFAULT POLICY]
+
+For theses rules to work as intended, your default access control policy must be set to `deny`.
+
+:::
+
+All rules requiring Authelia authentication were configured with `two_factor` (2FA). If you do not want 2FA on some or all rules replace the Policy with `one_factor`.
+
+In this guide we assume you have a group `admin` and a group `user` in ldap.  
+Members of the `admin` group will have access to everything.  
+Members of the `user` group will only have access to a select set of apps you choose.
 
 ## API Rule
 
@@ -44,11 +54,13 @@ These rules will protect the Vaultwarden admin page with Authelia but bypass whe
 
 ### Rule 1
 
+This rule will allow users of the `admin` group to access the vaulwarden admin page.
+
 Domain: `vaultwarden.domain.tld`
 
 Policy: `two_factor`
 
-Subject: `Not Used (Do Not Add)`
+Subject: `group:admin`
 
 Networks: `Not Used (Do Not Add)`
 
@@ -58,6 +70,25 @@ Resources: `^*/admin.*$`
 
 ### Rule 2
 
+This rule will prevent users not in the `admin` group to access the vaulwarden admin page.
+This is necessary even if the your default policy is set to `deny` because of the `bypass` rule below.
+
+Domain: `vaultwarden.domain.tld`
+
+Policy: `deny`
+
+Subject: `Not Used (Do Not Add)`
+
+Networks: `Not Used (Do Not Add)`
+
+Resources: `^*/admin.*$`
+
+![authelia-vw1](./img/authelia-vw2.png)
+
+### Rule 3
+
+This rule will bypass Authelia when accessing the webportal as auth is already provided by vaultwarden.
+
 Domain: `vaultwarden.domain.tld`
 
 Policy: `bypass`
@@ -68,20 +99,21 @@ Networks: `Not Used (Do Not Add)`
 
 Resources: `Not Used (Do Not Add)`
 
-![authelia-vw2](./img/authelia-vw2.png)
+![authelia-vw2](./img/authelia-vw3.png)
 
 ## User Rule
 
-This rule will allow users in the `lldap_user` group access to only the specified applications.
+This rule will allow users in the `user` group access to only the specified applications.
 
 Domain:
 
-- `radarr.domain.tld`
-- `sonarr.domain.tld`
+- `jellyfin.domain.tld`
+- `nextcloud.domain.tld`
+- `whateveryouwant.domain.tld`
 
 Policy: `two_factor`
 
-Subject: `group:lldap_user`
+Subject: `group:user`
 
 Networks: `Not Used (Do Not Add)`
 
@@ -91,7 +123,7 @@ Resources: `Not Used (Do Not Add)`
 
 ## Catch All Rule
 
-This rule will catch any access requests not covered by other rules.
+This rule will give access to everything to users of the `admin` group.
 
 Domain:
 
@@ -100,7 +132,7 @@ Domain:
 
 Policy: `two_factor`
 
-Subject: `group:lldap_admin`
+Subject: `group:admin`
 
 Networks: `Not Used (Do Not Add)`