How to clear the logs properly for a Docker container?

```bash
docker logs container_name > logs.txt
```

Replace `container_name` with the name or ID of the container, and `logs.txt` with the name of the file where you want to save the logs.

```bash
sudo nano /etc/logrotate.d/docker-container-name
```

Replace `docker-container-name` with the name of the container whose logs you want to clear. In the new configuration file, add the following lines:

```bash
/path/to/logs.txt {
    missingok
    notifempty
    size 100M
    create 0644 root root
    compress
    delaycompress
    sharedscripts
    postrotate
        docker exec container_name truncate -s0 /path/to/logs.txt
    endscript
}
```

Replace `/path/to/logs.txt` with the path to the log file you saved in step 1, and `container_name` with the name or ID of the container.

This configuration file tells `logrotate` to:

- Ignore missing log files (`missingok`)
- Don't rotate the log file if it's empty (`notifempty`)
- Rotate the log file if it exceeds 100MB in size (`size 100M`)
- Create new log files with permissions of 0644 and owned by root (`create 0644 root root`)
- Compress rotated log files (`compress`)
- Defer compression until the next rotation cycle (`delaycompress`)
- Run the specified script after the log file is rotated (`postrotate`)
- The script truncates the log file to 0 bytes, effectively clearing it (`docker exec container_name truncate -s0 /path/to/logs.txt`)
- End the script block (`endscript`)

Save and close the configuration file.

```bash
sudo logrotate --verbose /etc/logrotate.d/docker-container-name
```

This will show you what `logrotate` will do, without actually performing any actions.

```bash
sudo logrotate --force /etc/logrotate.d/docker-container-name
```

This will force `logrotate` to rotate the logs for the specified container.