fix(streamer): drop fonts-vt323 (not in bookworm) and use node fetch for healthcheck

- fonts-vt323 doesn't exist in debian bookworm; vt323 is loaded via google fonts cdn anyway.
- node:22-bookworm-slim has no wget; switch healthcheck to node -e fetch.

streamer/Dockerfile

@@ -16,7 +16,6 @@ RUN apt-get update \
       chromium \
       ffmpeg \
       fonts-noto-cjk \
-      fonts-vt323 \
       ca-certificates \
       tini \
  && rm -rf /var/lib/apt/lists/*