feat: add initial Homarr service configuration to Docker Compose

Co-authored-by: Copilot <copilot@github.com>

nodes/heimdall/homarr/compose.yaml

@@ -0,0 +1,23 @@
+services:
+  homarr:
+    container_name: homarr
+    image: ghcr.io/homarr-labs/homarr:latest
+    restart: unless-stopped
+    networks:
+      - proxy-net
+    volumes:
+      - /mnt/appdata/homarr/data:/appdata
+    environment:
+      - DOCKER_HOST=tcp://docker-socket-proxy:2375
+      - SECRET_ENCRYPTION_KEY=${SECRET_ENCRYPTION_KEY} # Generate a random 32-character string for this
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.homarr.entrypoints=websecure"
+      - "traefik.http.routers.homarr.rule=Host(`homarr.castaldifamily.com`)"
+      - "traefik.http.routers.homarr.tls=true"
+      - "traefik.http.routers.homarr.tls.certresolver=cloudflare"
+      - "traefik.http.routers.homarr.service=homarr"
+      - "traefik.http.services.homarr.loadbalancer.server.port=7575"
+networks:
+  proxy-net:
+    external: true