feat(k8s): add K8s manifests for all homelab services

traefik, gitea, adguard, nextcloud, errorpages, homepages,
uptime-kuma, kener, checkmk, headscale, dockmon, metube,
downtify, portainer, netronome, userbot

Includes Helm values, deployments, services, ingress routes,
configmaps, secrets (placeholders), postgres statefulsets,
kustomize overlays, and Traefik dynamic configuration.

downtify/k8s/downtify.yaml

@@ -0,0 +1,58 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: downtify-service
+  namespace: downtify
+spec:
+  selector:
+    app: downtify
+  ports:
+  - port: 8000
+    targetPort: 8000
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: downtify-deployment
+  namespace: downtify
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: downtify
+  template:
+    metadata:
+      labels:
+        app: downtify
+    spec:
+      containers:
+      - name: downtify
+        image: ghcr.io/henriquesebastiao/downtify:latest
+        ports:
+        - containerPort: 8000
+        volumeMounts:
+        - name: downloads
+          mountPath: /downloads
+        resources:
+          requests:
+            memory: "128Mi"
+            cpu: "200m"
+          limits:
+            memory: "1Gi"
+            cpu: "1"
+      volumes:
+      - name: downloads
+        persistentVolumeClaim:
+          claimName: downtify-downloads-pvc
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: downtify-downloads-pvc
+  namespace: downtify
+spec:
+  accessModes:
+  - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi