Add Docuseal e-signature service at sign.neuralplatform.ai

- k8s manifests: Deployment, Service, PVC, Ingress, ExternalSecret
- Argo CD app watching servers/legion/k8s/docuseal
- CF tunnel ingress rule for sign.neuralplatform.ai
- Vault secret at secret/docuseal (secret_key_base seeded)

servers/legion/apps/docuseal.yaml

@@ -0,0 +1,20 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: docuseal
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: https://git.neuralplatform.ai/will/infrastructure.git
+    targetRevision: main
+    path: servers/legion/k8s/docuseal
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: docuseal
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true