feat: web admin panel + better-sqlite3 migration + Docker fixes

- Added Express.js admin panel on port 3001 (ADMIN_PORT env)
  - Dashboard: stats (users, products, purchases, revenue)
  - Users: list, details, ban/unban toggle
  - Products: CRUD by category
  - Wallets: list with balances
  - Purchases: history with filters
  - Audit log: view audit trail
  - Auth: token-based login with ADMIN_SECRET env var
- Migrated sqlite3 → better-sqlite3
  - database.js: async adapter (runAsync/allAsync/getAsync)
  - purchaseService.js: lastID → lastInsertRowid
  - userService.js: lastID → lastInsertRowid
  - Removed sqlite3 from package.json
- Fixed: dotenv/config import added to index.js
- Fixed: ENCRYPTION_KEY validation (32+ char hex)
- Fixed: Dockerfile multi-stage build (no python needed)
- Fixed: Docker DNS (network: host in build)
- Fixed: docker-compose port 3001, healthcheck on 3001
- Added express, cookie-parser, pino-pretty, better-sqlite3 deps

docker-compose.yml

@@ -4,8 +4,11 @@ services:
     build:
       context: .
       dockerfile: ./Dockerfile
+      network: host
     hostname: telegram_shop_prod
     container_name: telegram_shop_prod
+    ports:
+      - "3001:3001"
     restart: always
     env_file:
       - .env
@@ -16,10 +19,13 @@ services:
       - NET_ADMIN
     sysctls:
       - net.ipv4.conf.all.src_valid_mark=1 # Необходимо для маршрутизации
+    dns:
+      - 8.8.8.8
+      - 1.1.1.1
     mem_limit: 512m
     cpus: "1.0"
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
+      test: ["CMD", "curl", "-sf", "http://localhost:3001/health"]
       interval: 30s
       timeout: 10s
       retries: 3