change port for next-js

 vi package.json

 "scripts": {
        "dev": "next -p 8020",

        "nuxt": "next",
        "build": "next build",
        "start": "next start -p 8020",

{
    "scripts": {
        "dev": "nuxt",
        "nuxt": "nuxt",
        "build": "nuxt build",
        "start": "nuxt start -p 8020",
        "generate": "nuxt generate",
        "build:local": "cross-env-shell APP_ENV=local nuxt build",
        "build:dev": "cross-env-shell APP_ENV=dev nuxt build",
        "build:prod": "cross-env-shell APP_ENV=prod nuxt build",
        "deploy:local": "yarn build:local && pm2 startOrRestart pm2.local.config.js --env local",
        "deploy:dev": "yarn build:dev && pm2 startOrRestart pm2.dev.config.js --env dev",
        "deploy:prod": "yarn build:prod && pm2 startOrRestart pm2.production.config.js --env prod",
    }
}