It's a pure browser js solution.

We use node.js only to provide https services, you can use any other web servers like Nginx, IIS, Apache.

The page is in the public folder.

Run node.js server.

npm i
node app.js

The code you should focus on mainly is in the first few lines of dps.js.

Set the path to the assets folder:

Dynamsoft.Core.CoreModule.engineResourcePaths.rootDirectory = 'path/to/assets'