sqlserver is restarting on docker,how to fix?

There can be multiple reasons why SQL Server is restarting on Docker. Here are a few steps that you can follow to troubleshoot the issue:

1. Check the Docker logs: Use the following command to check the Docker logs and look for any error messages that could explain why the container is restarting:

`docker logs <container-name>`

2. Check the Docker container status: Use the following command to check the status of the Docker container:

`docker ps -a`

If the container is restarting frequently, it may be in a restarting state. You can try to stop and start the container to see if it resolves the issue.

3. Check the SQL Server logs: If the container is restarting due to SQL Server issues, you can check the SQL Server logs to see if there are any errors. Use the following command to access the SQL Server logs:

`docker exec -it <container-name> /opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P <password> -Q "EXEC sp_readerrorlog"`

4. Check the Docker host resources: If the container is restarting due to resource constraints, you can check the Docker host resources to see if they are sufficient for running SQL Server. Use the following command to check the Docker host resources:

`docker system df`

If the host resources are insufficient, you can try to increase the resources allocated to Docker.

If none of the above steps work, you may need to seek help from a Docker or SQL Server expert to troubleshoot the issue further.