fix(docker): unignore scripts/ so EMEX VIN scraper ships to production

`.dockerignore` was excluding the entire `scripts/` tree, which meant
the build stage never received `scripts/emex-vin-scraper.js`. The
production-stage `COPY --from=build /app/scripts ./scripts` added in
the previous commit therefore failed with "/app/scripts: not found"
and the deploy aborted. Unignore the directory; runtime-only files
can be excluded individually if any get added later.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.dockerignore

@@ -5,7 +5,9 @@ node_modules
 .gitignore
 *.md
 docs
-scripts
+# scripts/ is shipped to the production image — EmexService loads
+# scripts/emex-vin-scraper.js at runtime via require(). Don't ignore
+# the whole tree; runtime-only files belong here.
 docker
 .env*
 .claude