Deploying ReactJS app from GitHub to Ubuntu via Actions

My team is working on an NodeJS app with a ReactJS frontend that needs to be deployed on our Ubuntu server. It runs fine locally and it used to run fine on the server until we added a Router/Switch structure into the App.js. Now we get 404 and 502 errors and I'm thinking of adding some GitHub action to automate the deployment process with npm run build and all. Ideally, every time we push to GitHub, the app on the server should update without someone having to tunnel in and type something manually. Can anyone suggest a ready-made YAML file for that purpose? How would we trigger it on our Ubuntu server? Would we run it under nginx (like now) or apache?