Cross-platform hardening — removes all hardcoded /app/ paths from route files and routes them through platform-paths.js so the app works the same way regardless of Docker layout (single-file mount vs consolidated data dir). Changes: - platform-paths.js: add generatedCertsDir, pkiDir, containerUpdatesDir, containerFrontendDir, containerAssetsDir, resolveAssetsPath() - self-updater.js: UPDATE_URL/MIRROR_URL/CHANNEL env var overrides - routes/ca.js: use platformPaths for cert paths and generated certs dir - routes/services.js: use platformPaths.pkiRootCert - routes/themes.js: derive THEMES_DIR from platformPaths.servicesFile - routes/config/assets.js + backup.js: use resolveAssetsPath() fallback - routes/services.js + src/app.js: use platformPaths.pkiRootCert - server.js: HOST env var support, parse PORT as int - src/app.js: GET /api/v1/version (public, no auth), global request timeout, disable x-powered-by, trust proxy - pylon/dashcaddy-pylon.js: PYLON_HOST env var, graceful shutdown on SIGTERM/SIGINT A fresh user can now deploy with a custom Docker layout (e.g. /opt/dc/data/ as a single volume mount) and the app finds its files automatically, no env var configuration required.