This is a project for help me. How I upload file with FileReader api, and this help you this too.
Has two ways run this project, one with docker and two with node local.
docker build -t file-example .
npm install
npm run start:dev
Open index.html file into the public > index.html and send a file
If you want build this poject you can run:
npm run build
After you build, was created a dist directory, and you can run with node.js.