Environment Variables Missing `npm run start`

All of my environment variables are missing or undefined after running

npm run build

npm run build

and

npm run start

npm run start

npm run dev

npm run dev

works as expected.

Does the build have access to the

.env

.env

file at the root of the project? If not, how do I access them in the build?

Environment Variables Missing `npm run start` - SolidJS