Remove demo deployment folder (moved to nomad-demo repo)

demo/.env.example

@@ -1,5 +0,0 @@
-# Demo admin credentials (use strong password in production!)
-DEMO_ADMIN_PASS=admin12345
-
-# JWT secret (change this!)
-JWT_SECRET=demo-secret-change-me-in-production

demo/docker-compose.yml

@@ -1,24 +0,0 @@
-services:
-  app:
-    image: mauriceboe/nomad:latest
-    container_name: nomad-demo
-    ports:
-      - "3000:3000"
-    environment:
-      - NODE_ENV=production
-      - PORT=3000
-      - DEMO_MODE=true
-      - DEMO_ADMIN_USER=admin
-      - DEMO_ADMIN_EMAIL=admin@nomad.app
-      - DEMO_ADMIN_PASS=${DEMO_ADMIN_PASS:-admin12345}
-      - JWT_SECRET=${JWT_SECRET:-demo-secret-change-me-in-production}
-    volumes:
-      - ./data:/app/data
-      - ./uploads:/app/uploads
-    restart: unless-stopped
-    healthcheck:
-      test: ["CMD", "wget", "-qO-", "http://localhost:3000/api/auth/app-config"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
-      start_period: 15s