Production build in react is not loading css file

Question

So I have a reactjs project with typescript including scss, javascript is working perfeclty fine but page is loading without CSS.

my package.json file:

{
  "name": "qb-front",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@babel/core": "^7.20.12",
    "@mui/icons-material": "^5.11.0",
    "@mui/material": "^5.11.3",
    "@reduxjs/toolkit": "^1.8.3",
    "@testing-library/jest-dom": "^5.16.4",
    "@testing-library/react": "^13.3.0",
    "@testing-library/user-event": "^14.2.3",
    "@types/jest": "^27.5.2",
    "@types/node": "^17.0.45",
    "@types/react": "^18.0.15",
    "@types/react-dom": "^18.0.6",
    "@types/react-redux": "^7.1.24",
    "@types/redux-saga": "^0.10.5",
    "axios": "^0.27.2",
    "bootstrap": "^5.2.0",
    "formik": "^2.2.9",
    "jquery": "^3.6.0",
    "jwt-decode": "^3.1.2",
    "moment": "^2.29.4",
    "node-forge": ">=1.3.0",
    "popper.js": "^1.16.1",
    "react": "^18.2.0",
    "react-bootstrap": "^2.5.0",
    "react-dom": "^18.2.0",
    "react-hot-toast": "^2.3.0",
    "react-icons": "^4.4.0",
    "react-player": "^2.11.0",
    "react-redux": "^8.0.2",
    "react-router-dom": "^6.3.0",
    "react-scripts": "5.0.1",
    "react-select": "^5.4.0",
    "reactstrap": "^9.1.1",
    "redux": "^4.2.0",
    "redux-saga": "^1.1.3",
    "sass": "^1.57.1",
    "typescript": "^4.7.4",
    "web-vitals": "^2.1.4",
    "yup": "^0.32.11"
  },
  "scripts": {
    "start": "react-scripts start tsc --watch",
    "build": "GENERATE_SOURCEMAP=false PUBLIC_URL=/ react-scripts build",
    "winBuild": "set \"GENERATE_SOURCEMAP=false\" &&  react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "lint": "eslint src/**/*.{js,jsx,ts,tsx,json}",
    "lint:fix": "eslint --fix 'src/**/*.{js,jsx,ts,tsx,json}'",
    "format": "prettier --write 'src/**/*.{js,jsx,ts,tsx,css,md,json}' --config ./.prettierrc",
    "dev": "tsc --watch"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "@types/jquery": "^3.5.14",
    "@types/prettier": "^2.7.2",
    "@typescript-eslint/eslint-plugin": "^5.30.5",
    "@typescript-eslint/parser": "^5.30.5",
    "eslint": "^8.19.0",
    "eslint-config-airbnb": "^19.0.4",
    "eslint-config-prettier": "8.5.0",
    "eslint-plugin-import": "^2.26.0",
    "eslint-plugin-jsx-a11y": "^6.6.0",
    "eslint-plugin-prettier": "4.2.1",
    "eslint-plugin-react": "^7.30.1",
    "eslint-plugin-react-hooks": "^4.6.0",
    "prettier": "^2.8.2"
  }
}

Localhost with npm start works perfectly fine, but when i build, css are gone.

Here is a screnshot from network:

network

Extra infos:

• project is running nginx and docker on a server node-16
• sass installed as normal dependency
• project has mui - bootstrap - scss

app.scss

file structure: App.js has app.scss imported. app.scss has imported variables.scss from assets folder.

There are no errors in terminal, server and docker logs, and this is the only output for sass.

LOG from ./node_modules/react-scripts/node_modules/sass-loader/dist/cjs.js sass-loader ./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[7].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[7].use[2]!./node_modules/resolve-url-loader/index.js??ruleSet[1].rules[1].oneOf[7].use[3]!./node_modules/react-scripts/node_modules/sass-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[7].use[4]!./src/App.scss
<w> Deprecation $weight: Passing a number without unit % (100) is deprecated.
<w>
<w> To preserve current behavior: $weight * 1%
<w>
<w> More info: https://sass-lang.com/d/function-units
<w>
<w> node_modules\bootstrap\scss\_functions.scss 201:11            opaque()
<w> node_modules\bootstrap\scss\mixins\_table-variants.scss 4:28  table-variant()
<w> node_modules\bootstrap\scss\_tables.scss 147:3                @import
<w> node_modules\bootstrap\scss\bootstrap.scss 20:9               @import
<w> src\App.scss 1:9                                              root stylesheet
<w>

Update: new error that I occurred in mozzila firefox, I was using chrome/brave:

Layout was forced before the page was fully loaded. If stylesheets are not yet loaded this may cause a flash of unstyled content. node.js:396
The stylesheet /static/css/main.c4cbb89d.css was not loaded because its MIME type, “text/plain”, is not “text/css”.

im trying to use scss but it seems react is failing to compile.