The app is composed of many Javascript/Typescript files compiled that will run only on my browser.

So I think it should be feasible to provide a zip file with only compiled static files (html, js, css, png, ...) that I can host on an existing webserver (without docker), a CDN, an S3 or similar solution.
I.E. the content of the dist folder after the npm build step.

I can modify the Github pipeline to publish the artifact after the build, for example.