Add Docker deployment for Unraid

- Add Dockerfile.unraid with multi-stage build (builds inside container)
- Add docker-compose.unraid.yml for easy deployment
- Add build-and-push.sh script for building and pushing to Gitea registry
- Update root redirect to /unraid dashboard

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.unraid.yml

@@ -0,0 +1,34 @@
+version: "3.8"
+
+services:
+  homarr-unraid:
+    image: git.xtrm-lab.org/jazzymc/homarr:latest
+    container_name: homarr-unraid-ui
+    restart: unless-stopped
+    ports:
+      - "7576:7575"
+    environment:
+      # Unraid API Configuration
+      - UNRAID_HOST=192.168.10.20
+      - UNRAID_API_KEY=${UNRAID_API_KEY}
+      - UNRAID_USE_SSL=false
+      - UNRAID_PORT=80
+      # App Configuration
+      - TZ=Europe/Sofia
+      - DATABASE_URL=file:/data/db.sqlite
+      - AUTH_TRUST_HOST=true
+      - NEXTAUTH_URL=http://192.168.10.20:7576
+      - NEXTAUTH_SECRET=${NEXTAUTH_SECRET:-changeme}
+    volumes:
+      - /mnt/user/appdata/homarr-unraid/data:/data
+      - /mnt/user/appdata/homarr-unraid/configs:/app/data/configs
+    networks:
+      - unraid-net
+    labels:
+      - "net.unraid.docker.managed=true"
+      - "net.unraid.docker.icon=https://homarr.dev/img/logo.png"
+      - "net.unraid.docker.webui=http://[IP]:[PORT:7576]"
+
+networks:
+  unraid-net:
+    driver: bridge