argocd: Deploy Argo CD

[Argo CD] is a Kubernetes-native GitOps/continuous deployment manager.
It monitors the state of Kubnernetes resources, such as Pods,
Deployments, ConfigMaps, Secrets, and Custom Resources, and synchronizes
them with their canonical definitions from a Git repository.

*Argo CD* consists of various components, including a Repository
Service, an Application Controller, a Notification Controller, and an
API server/Web UI.  It also has some optional components, such as a
bundled Dex server for authentication/authorization, and an
ApplicationSet controller, which we will not be using.

[Argo CD]: https://argo-cd.readthedocs.io/

authelia/configuration.yml

@@ -65,6 +65,12 @@ identity_providers:
       redirect_uris:
       - http://127.0.0.1
       pre_configured_consent_duration: 7d
+    - id: argocd
+      description: Argo CD
+      redirect_uris:
+      - https://argocd.pyrocufflink.blue/auth/callback
+      secret: >-
+        $pbkdf2-sha512$310000$l/uOezgWjqe3boGLYAnKcg$uqn1FC8Lj2y1NG5Q91PeLfLLUQ.qtlKFLd0AWJ56owLME9mV/Zx8kQ2x7OS/MOoMLmUgKd4zogYKab2HGFr0kw
 
 log:
   level: trace