add tini

Dockerfile

@@ -54,6 +54,7 @@ COPY --from=ffmpeg-builder ./ffprobe/ffprobe /usr/bin/ffprobe
 RUN apt-get clean && apt-get -y update && apt-get -y install --no-install-recommends \
     nginx \
     atomicparsley \
+    tini \
     curl && rm -rf /var/lib/apt/lists/*
 
 # install debug tools for testing environment
@@ -88,4 +89,4 @@ EXPOSE 8000
 
 RUN chmod +x ./run.sh
 
-CMD ["./run.sh"]
+CMD ["/bin/tini", "--", "./run.sh"]