Replaces inline docker:test script with scripts/docker-test.sh that: - Detects and reports architecture (x86_64/arm64) - Polls health endpoint with configurable timeout (60s) - Verifies home page, health/live, health/ready endpoints - Tests WebSocket endpoint reachability - Proper cleanup on exit via trap - Supports --skip-build flag for CI caching Co-authored-by: ajnart <49837342+ajnart@users.noreply.github.com>