Mempool.Space docker compose

docker-compose-mempool.yml

version: '3.7'

services:
  web:
    image: mempool/frontend:v2.5.0
    user: "1000:1000"
    restart: on-failure
    stop_grace_period: 1m
    command: "./wait-for mariadb:3306 --timeout=720 -- nginx -g 'daemon off;'"
    environment:
      FRONTEND_HTTP_PORT: "8080"
      BACKEND_MAINNET_HTTP_HOST: "api"
    ports:
      - 3006:8080
    depends_on:
      - api
      - mariadb
  api:
    image: mempool/backend:v2.5.0
    user: "1000:1000"
    stop_grace_period: 1m
    command: "./wait-for-it.sh mariadb:3306 --timeout=720 --strict -- ./start.sh"
    environment:
      MEMPOOL_BACKEND: "electrum"
      CORE_RPC_HOST: "10.11.12.61"
      CORE_RPC_PORT: "8332"
      CORE_RPC_USERNAME: "bitcoin"
      CORE_RPC_PASSWORD: "bitcoin"
      ELECTRUM_HOST: "10.11.12.63"
      ELECTRUM_PORT: "50001"
      ELECTRUM_TLS: "false"
      DATABASE_ENABLED: "true"
      DATABASE_HOST: "mariadb"
      DATABASE_PORT: "3306"
      DATABASE_DATABASE: "mempool"
      DATABASE_USERNAME: "mempool"
      DATABASE_PASSWORD: "mempool"
      LIGHTNING_ENABLED: "false"
    volumes:
      - mempool-cache:/backend/cache
    depends_on:
      - mariadb
  mariadb:
    image: mariadb:10.5.12
    restart: on-failure
    stop_grace_period: 1m
    environment:
      MYSQL_DATABASE: "mempool"
      MYSQL_USER: "mempool"
      MYSQL_PASSWORD: "mempool"
      MYSQL_ROOT_PASSWORD: "mempool"
    volumes:
      - mempool-db:/var/lib/mysql
volumes:
  mempool-db:
  mempool-cache:

How to set it for Testnet network.