Those 4 files allow you to serve and build the correct app based on what you need. Change the values if needed. I recommend changing only the *.local files as they are only for local development. Changing the other files might break the CI/CD of the repo.
Those 4 files allow you to serve and build the correct app based on what you need. Change the values if needed. I recommend reading the documentation of Vue CLI [link](https://cli.vuejs.org/guide/mode-and-env.html#modes-and-environment-variables). Changing the other files might break the CI/CD of the repo.