Can not import local module

I am trying to import a local module on a node.js application and I do not seem to be able to.

modules/date.js :

const getDate = () => {...};
const getDay = () => {...};
export {getDate, getDay};

app.ts :

import {getDay, getDate} from "/modules/date";
//import {getDay, getDate} from "/modules/date.js"; doesn't work either

The error : Cannot find module '/modules/date' or its corresponding type declarations.ts(2307)

Config files

package.json :

 {
  "dependencies": {
    "ejs": "^3.1.8",
    "express": "^4.18.2",
    "mongoose": "^6.8.3",
    "nodemon": "^2.0.20",
    "typescript": "^4.9.4"
  },
  "name": "todolist",
  "version": "1.0.0",
  "description": "A simple todo list",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Infinite Learner",
  "license": "ISC",
  "devDependencies": {
    "@types/express": "^4.17.15"
  },
  "type": "module"
}

tsconfig.json:

{
  "compilerOptions": {
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "lib": ["es6"],                                      /* Specify a set of bundled library declaration files that describe the target runtime environment. */
   
    /* Modules */
    "moduleResolution": "node",
    "rootDir": "./",                                     /* Specify the root folder within your source files. */
   
    /* Emit */
    "outDir": "build",                                   /* Specify an output folder for all emitted files. */
   
    /* Interop Constraints */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */

    /* Type Checking */
    "strict": true,                                      /* Enable all strict type-checking options. */

    /* Completeness */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  }
}

Do you know what I am missing ?

Thank you.