When IS_STATIC_EXPORT=true, SWA needs to know where to find the
built static files. Next.js static export outputs to 'out/' directory.
Configuration:
- app_location: '/' (repository root - where source is)
- output_location: 'out' (where Next.js static export files are)
- IS_STATIC_EXPORT: true (skip Oryx build, use pre-built files)
- skip_app_build: true (we already built in npm run build step)
This tells SWA to look for index.html in the 'out' directory.