Playwright has a doc page for this here: https://playwright.dev/docs/test-parameterize#env-files
However, reading environment variables is built into Node.js now, one can do node --env-file=.beta.env app.js, for example. Doc page here: https://nodejs.org/en/learn/command-line/how-to-read-environment-variables-from-nodejs
One can presumably leverage this if running Playwright via CLI, but how would one leverage this if using Playwright via its vscode extension?