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To configure serializers for the JanusGraph server's docker image, you need to update the JanusGraph configuration. Here are the steps to follow:

1. Create a new file named janusgraph-serializer.yaml and add the following content:

# Serializer configuration for JanusGraph
serializers:
  - {
      className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0,
      config: {
        ioRegistries: ["org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry"]
      }
    }

This configuration specifies that the GryoMessageSerializerV3d0 serializer should be used with JanusGraphIoRegistry.

1. Mount the configuration file to the JanusGraph Docker container by adding the following line to the docker run command:

-v /path/to/janusgraph-serializer.yaml:/opt/janusgraph/conf/janusgraph-serializer.yaml

This mounts the configuration file into the JanusGraph container at the path /opt/janusgraph/conf/janusgraph-serializer.yaml.

1. Restart the JanusGraph Docker container for the new configuration to take effect:

docker restart janusgraph-container

With these steps, you have successfully configured serializers for the JanusGraph server's docker image.