Usage?

[justlife4x4]

Hii,
My docker-compose.yml looks kinda like this

version: '3.9'
services:
  api:
    container_name: hotelapp_api
    build: .
    ports:
      - 4000:4000
      - 4001:4001
      # - 27017:27017
      # - 6379:6379
      # - 587:587
    environment:
      - Env='Values'
    deploy:
      resources:
        limits:
          memory: "1g"      # 1 GB RAM
          cpus: "1.0"       # 1 vCPU

How to implement it?