feat(n8n): extract n8n stack from development/compose.yaml

Phase 1 of Komodo migration: n8n moves to its own stack.
Gitea, Gitea-Runner and komodo remain Unraid-managed.

n8n/compose.yaml

@@ -0,0 +1,30 @@
+services:
+  n8n:
+    container_name: "n8n"
+    entrypoint:
+      - "tini"
+      - "--"
+      - "/docker-entrypoint.sh"
+    environment:
+      - "TZ=Europe/Berlin"
+      - "GENERIC_TIMEZONE=Europe/Amsterdam"
+      - "WEBHOOK_URL=https://n8n.arnoutvw.nl"
+      - "N8N_SECURE_COOKIE=false"
+      - "N8N_RELEASE_TYPE=stable"
+      - "NODE_ENV=production"
+      - "NPM_CONFIG_UPDATE_NOTIFIER=false"
+    image: "n8nio/n8n"
+    ipc: "private"
+    logging:
+      driver: "json-file"
+      options:
+        max-file: "1"
+        max-size: "50m"
+    network_mode: "bridge"
+    ports:
+      - "5678:5678/tcp"
+    restart: "unless-stopped"
+    user: "node"
+    volumes:
+      - "/mnt/cache/appdata/n8n:/home/node/.n8n"
+    working_dir: "/home/node"