trailing-slash E2E Test

This Cypress suite tests the trailingSlash option inside gatsby-config and its various different settings it takes. When you want to work on it, start watching packages inside the packages and start gatsby-dev-cli in this E2E test suite.

Locally you can run for development:

TRAILING_SLASH=your-option yarn debug:develop

And for a build + serve:

TRAILING_SLASH=your-option yarn build && yarn debug:build