jq "$addJson + ." > "$dir/$layerId/json" <<-'EOJSON'
                {
                    "created": "0001-01-01T00:00:00Z",
                    "container_config": {
                        "Hostname": "",
                        "Domainname": "",
                        "User": "",
                        "AttachStdin": false,
                        "AttachStdout": false,
                        "AttachStderr": false,
                        "Tty": false,
                        "OpenStdin": false,
                        "StdinOnce": false,
                        "Env": null,
                        "Cmd": null,
                        "Image": "",
                        "Volumes": null,
                        "WorkingDir": "",
                        "Entrypoint": null,
                        "OnBuild": null,
                        "Labels": null
                    }
                }
            EOJSON

jq: error: syntax error, unexpected '+', expecting $end (Windows cmd shell quoting issues?) at <top-level>, line 1:
 + del(.history, .rootfs)
jq: 1 compile error