chore(deps): update sonatype/nexus3 docker tag to v3.81.0

[renovate]

This PR contains the following updates:

Package	Update	Change
sonatype/nexus3	minor	3.80.0 -> 3.81.0

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[wanghe-fit2cloud]

The provided code difference seems to be intended for updating the Nexus Docker image version from 3.80.0 to 3.81.0. There are no apparent irregularities, but here is a brief review:

1. Image Update: The change in the image field correctly updates from the older version (sonatype/nexus3:3.80.0) to the newer version (sonatype/nexus3:3.81.0). This maintains compatibility with any new features or improvements available in the latest release.

2. Restart Policy: The restart: always statement ensures that the Nexus container will automatically restart if it crashes, which is crucial for maintaining service availability.

3. Environment Variables: There are not many changes listed under environment, so these lines can likely remain unchanged unless there were specific configurations added or modified between versions, particularly those related to custom settings like database credentials or additional plugins.

4. Container Name: The ${CONTAINER_NAME} placeholder remains unchanged, suggesting you might have already defined this environment variable elsewhere in your script or deployment configuration file.

Overall, the difference appears to be straightforward and focused on an essential update of the software component. If you're unsure about other aspects such as network configurations or external dependencies, more context would be helpful for further analysis.

[wanghe-fit2cloud]

There is an error in your Docker Compose file:

• Line 4: The sonatype/nexus3:3.80.0 image has been replaced with the updated version sonatype/nexus3:3.81.0.

Additionally, you may consider adding logging to your Nexus container for better monitoring and troubleshooting:

services:
  nexus:
    image: sonatype/nexus3:3.81.0
    restart: always
    container_name: ${CONTAINER_NAME}
    environment:
      - X_NEXUS_LOG_LEVEL=DEBUG
    volumes:
      - /path/to/logs:/opt/sonatype-nexuslogs

This allows you to access log files on your host machine if needed while still keeping them within the Docker volume managed by Docker Compose.

Note that this example assumes there is already a volume defined at /volumes, which should be adjusted according to your setup.