add yt-restreamer and build prod docker image

.build/prod/yt-restream.Dockerfile

@@ -0,0 +1,12 @@
+FROM debian:latest
+
+WORKDIR /root/
+
+RUN apt update \
+ && apt install -y python3-pip curl ffmpeg \
+ && pip install yt-dlp --break-system-packages
+
+COPY yt-restream.sh .
+WORKDIR /var/www/html
+
+CMD python3 -m http.server -d live/ & /root/yt-restream.sh