feat: add Digital Ocean deployment configuration

- Create docker-compose.digitalocean.yml for registry-based deployment
- Add .env.digitalocean.example template for cloud deployment
- Add comprehensive DIGITAL_OCEAN_DEPLOYMENT.md guide
- Configure image pulling from Gitea registry
- Include SSL setup with Caddy/Traefik
- Add backup, monitoring, and security instructions

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

docker-compose.digitalocean.yml

@@ -0,0 +1,137 @@
+version: '3.8'
+
+# ==========================================
+# VIP Coordinator - Digital Ocean Deployment
+# ==========================================
+# This compose file pulls pre-built images from Gitea registry
+# No local builds required - perfect for cloud deployment
+
+services:
+  # PostgreSQL Database
+  postgres:
+    image: postgres:16-alpine
+    container_name: vip-coordinator-postgres
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB:-vip_coordinator}
+      POSTGRES_USER: ${POSTGRES_USER:-vip_user}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?POSTGRES_PASSWORD must be set}
+    volumes:
+      - vip-coordinator-postgres-data:/var/lib/postgresql/data
+    networks:
+      - vip-coordinator-network
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-vip_user}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+    restart: unless-stopped
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
+
+  # Redis Cache
+  redis:
+    image: redis:7-alpine
+    container_name: vip-coordinator-redis
+    volumes:
+      - vip-coordinator-redis-data:/data
+    networks:
+      - vip-coordinator-network
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 3s
+      retries: 5
+      start_period: 5s
+    restart: unless-stopped
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
+    command: redis-server --appendonly yes
+
+  # NestJS Backend API (from Gitea registry)
+  backend:
+    image: ${GITEA_REGISTRY:-192.168.68.53:3000}/kyle/vip-coordinator/backend:${IMAGE_TAG:-latest}
+    container_name: vip-coordinator-backend
+    environment:
+      # Database Configuration
+      DATABASE_URL: postgresql://${POSTGRES_USER:-vip_user}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB:-vip_coordinator}
+
+      # Redis Configuration
+      REDIS_URL: redis://redis:6379
+
+      # Auth0 Configuration
+      AUTH0_DOMAIN: ${AUTH0_DOMAIN:?AUTH0_DOMAIN must be set}
+      AUTH0_AUDIENCE: ${AUTH0_AUDIENCE:?AUTH0_AUDIENCE must be set}
+      AUTH0_ISSUER: ${AUTH0_ISSUER:?AUTH0_ISSUER must be set}
+
+      # Application Configuration
+      NODE_ENV: production
+      PORT: 3000
+
+      # Optional: AviationStack API (for flight tracking)
+      AVIATIONSTACK_API_KEY: ${AVIATIONSTACK_API_KEY:-}
+
+      # Optional: Database seeding
+      RUN_SEED: ${RUN_SEED:-false}
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    networks:
+      - vip-coordinator-network
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3000/api/v1/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+    restart: unless-stopped
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
+
+  # React Frontend (Nginx) (from Gitea registry)
+  frontend:
+    image: ${GITEA_REGISTRY:-192.168.68.53:3000}/kyle/vip-coordinator/frontend:${IMAGE_TAG:-latest}
+    container_name: vip-coordinator-frontend
+    ports:
+      - "${FRONTEND_PORT:-80}:80"
+    depends_on:
+      backend:
+        condition: service_healthy
+    networks:
+      - vip-coordinator-network
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost/health"]
+      interval: 30s
+      timeout: 3s
+      retries: 3
+      start_period: 5s
+    restart: unless-stopped
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
+
+# Named volumes for data persistence
+volumes:
+  vip-coordinator-postgres-data:
+    name: vip-coordinator-postgres-data
+  vip-coordinator-redis-data:
+    name: vip-coordinator-redis-data
+
+# Dedicated network for service communication
+networks:
+  vip-coordinator-network:
+    name: vip-coordinator-network
+    driver: bridge