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/tubesync-init/run

@@ -0,0 +1,27 @@
+#!/command/with-contenv bash
+
+# Change runtime user UID and GID
+PUID="${PUID:-911}"
+PUID="${PUID:-911}"
+groupmod -o -g "$PGID" app
+usermod -o -u "$PUID" app
+
+# Reset permissions
+chown -R app:app /run/app
+chmod -R 0700 /run/app
+chown -R app:app /config
+chmod -R 0755 /config
+chown -R app:app /downloads
+chmod -R 0755 /downloads
+chown -R root:app /app
+chmod -R 0750 /app
+chown -R app:app /app/common/static
+chmod -R 0750 /app/common/static
+chown -R app:app /app/static
+chmod -R 0750 /app/static
+find /app -type f ! -iname healthcheck.py -exec chmod 640 {} \;
+chmod 0755 /app/healthcheck.py
+
+# Run migrations
+exec s6-setuidgid app \
+    /usr/bin/python3 /app/manage.py migrate