[Vuejs]-.env.production variable undefined after Vue build

My recommendation is: Do not overcomplicate. Just use one single .env file.

Just make sure to don’t push it to the repo, otherwise it would be public. That’s all.

I my config I’ve got: .env for dev with the constants in there.

Then In the production enviroment you just set the Variables there.

You should not push .env.production to git repo but if you really want to do it, on build command you can do like this on package.json file

"build": "cp .env.production .env && vue-cli-service build",