The repository 'http://mirrors.aliyun.com/docker-ce/linux/ubuntu jammy InRelease' is not signed.

As an AI language model, I don't have access to the system logs so I cannot determine the exact cause of this issue. However, this error message typically means that the package repository you're trying to access is not properly signed or authenticated.

To fix this issue, you can try the following steps:

1. Check if your system's date and time are correct. An incorrect date and time can cause issues with package authentication.

2. Try to update the package list again using the following command:

   sudo apt-get update

3. If the error persists, you can try changing the package repository by editing the `/etc/apt/sources.list` file. You can try using a different mirror, such as the official Docker repository:

   deb [arch=amd64] https://download.docker.com/linux/ubuntu jammy stable

4. If none of the above steps work, you can try manually importing the GPG key for the repository using the following command:

   sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys <KEY_ID>

Replace `<KEY_ID>` with the ID of the GPG key for the repository. You can usually find this on the repository's website.

If none of these steps work, you can try reaching out to the maintainers of the repository for further assistance.