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.

nextcloud/compose.yaml

@@ -6,15 +6,13 @@ services:
     container_name: nextcloud-aio-mastercontainer # Do not change
     volumes:
       - nextcloud_aio_mastercontainer:/mnt/docker-aio-config # Do not change (backup) 
-      - /var/run/docker.sock:/var/run/docker.sock:ro
+      - /var/run/docker.sock:/var/run/docker.sock
       - /dev/dri:/dev/dri
+    ports:
+      - 8080:8080
     networks:
       - nextcloud-aio
       - proxy # Optional: Connects the mastercontainer to the proxy network in order to make the built-in reverse proxy detection work. See https://github.com/nextcloud/all-in-one/blob/main/reverse-proxy.md
-      # ports:
-      # - 8081:80 # may be removed if under reverse-proxy
-      # - 8443:8443 
-      # - 8888:8080 # AIO
 
     labels:
       - "traefik.enable=true"