switch to s6 v3, bump s6 to 3.1.2.1, bump ffmpeg to 2023-01-03-12-55, bump yt-dlp to 2023.01.06, fix multi-arch builds

config/root/etc/s6-overlay/s6-rc.d/celery-worker/run

@@ -0,0 +1,24 @@
+#!/usr/bin/with-contenv bash
+
+UMASK_SET=${UMASK_SET:-022}
+umask "$UMASK_SET"
+
+cd /app || exit
+
+PIDFILE=/run/app/celery-worker.pid
+
+if [ -f "${PIDFILE}" ]
+then
+    PID=$(cat $PIDFILE)
+    echo "Unexpected PID file exists at ${PIDFILE} with PID: ${PID}"
+    if kill -0 $PID
+    then
+        echo "Killing old gunicorn process with PID: ${PID}"
+        kill -9 $PID
+    fi
+    echo "Removing stale PID file: ${PIDFILE}"
+    rm ${PIDFILE}
+fi
+
+#exec s6-setuidgid app \
+#    /usr/local/bin/celery --workdir /app -A tubesync worker --pidfile ${PIDFILE} -l INFO