How to add annotations?

Nomad
1

Docker (and podman) maintained containers can have annotations, which I can retrieve like this (I removed error handling for brevity):

package main

import (
	"context"

	"github.com/alecthomas/repr"
	"github.com/docker/docker/api/types/container"
	"github.com/docker/docker/client"
)

func main() {
	apiClient, err := client.NewClientWithOpts(client.FromEnv)
	containers, err := apiClient.ContainerList(context.Background(), container.ListOptions{All: true})
	for _, container := range containers {
		if container.State == "running" {
			repr.Println(container.HostConfig.Annotations) // returns nil for all my nomad jobs
		}
	}
}

However, I found no way to add annotations to a nomad job. Is that possible somehow?

Or, asked the other way around: when I iterate over all running docker containers using the golang docker client api, how do I know, which one is which?

Thanks in advance,
Tom