Setup custom domain with subdomain for React application

[vanfossen]

Hello! I have been using your deploy action for quite a while but wanted to try and setup a custom domain like project.example.com.

When attempting to do this with the default username.github.io domain, I needed to add a "homepage" attribute to package.json. For the default domain, it looked like: "homepage": "https://rastonlab.github.io/Virtual-FTIR-Spectrometer/".

For my custom domain: ftir.rastonlab.org, I have tried both: "homepage": "https://ftir.rastonlab.org/Virtual-FTIR-Spectrometer/" and "homepage": "https://ftir.rastonlab.org/" but the page loads to a white screen with errors in the console:

GET https://ftir.rastonlab.org/virtual-ftir-spectrometer/static/js/main.f1a4d153.js net::ERR_ABORTED 404
GET https://ftir.rastonlab.org/virtual-ftir-spectrometer/static/css/main.6efc8ff8.css 404
GET https://ftir.rastonlab.org/virtual-ftir-spectrometer/manifest.json 404
manifest.json:1 Manifest: Line: 1, column: 1, Syntax error.

I am unsure if it is a file path issue or something else. The DNS in the repository settings appears correctly so I do not believe that to be an issue. Curious if you have any idea or suggestions! I have reverted my repository back to the default: https://github.com/RastonLab/Virtual-FTIR-Spectrometer