trying an start.sh file

Dockerfile

@@ -14,4 +14,5 @@ RUN mkdir -p /usr/share/man/man1 && \
 COPY README.md .
 COPY src .
 
-CMD [ "python", "-u", "./main.py" ]
+# CMD ["python", "-u", "./main.py"]
+CMD ["./start.sh"]

src/start.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+echo "Starting Lavalink server and waiting 20s..."
+java -jar Lavalink.jar 1>/dev/null &
+sleep 20
+echo "Done."
+python3 -u ./main.py