Vue Cli project is not getting CSS in production of TailwindCSS

I am working with TailwindCSS. But it's not getting CSS properly. But in development server it is working perfectly.

http://nafee.xyz/dist/

Package.json

{
  "name": "filter",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build --skip-plugins @vue/cli-plugin-eslint",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "autoprefixer": "^9.8.6",
    "core-js": "^3.6.5",
    "postcss": "^7.0.35",
    "tailwindcss": "npm:@tailwindcss/postcss7-compat@^2.0.1",
    "vue": "^2.6.11"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/cli-plugin-eslint": "~4.5.0",
    "@vue/cli-service": "~4.5.0",
    "babel-eslint": "^10.1.0",
    "eslint": "^6.7.2",
    "eslint-plugin-vue": "^6.2.2",
    "vue-template-compiler": "^2.6.11"
  },
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/essential",
      "eslint:recommended"
    ],
    "parserOptions": {
      "parser": "babel-eslint"
    },
    "rules": {
      "no-mixed-spaces-and-tabs": 0
    }
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not dead"
  ]
}