Electron could be a solution if you really need a packaged app. Maybe a missunderstood your question but why not just host it on firebase hosting or another hosting provider. I deploy react apps this way and I'm happy with it but you could do the same thing without any framework, you could even combine it with github action or other ci/cd (gitlab etc ...) to build and deploy on push. (After reading some comments, If the app does http request to server which don't have cors open it don't seems to be an option.
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Electron could be a solution if you really need a packaged app. Maybe a missunderstood your question but why not just host it on firebase hosting or another hosting provider. I deploy react apps this way and I'm happy with it but you could do the same thing without any framework, you could even combine it with github action or other ci/cd (gitlab etc ...) to build and deploy on push. (After reading some comments, If the app does http request to server which don't have cors open it don't seems to be an option.