The previous .dockerignore excluded the scripts/ directory to keep
the runtime image lean, but build-og-image.mjs is invoked as part
of 'npm run build' (which is 'npm run og-image && next build'). Without
the script in the build context, the Docker build fails with:
Error: Cannot find module '/app/scripts/build-og-image.mjs'
The scripts/ directory is needed at build time only; the final
runner image doesn't execute any of these files, so including them
in the build context is harmless. The script is small (~4.6 KB)
and only runs during 'npm run build' in the builder stage.
