Expected Behavior

That docker run untergeek/curator should start curator.

Actual Behavior

On RedHat Enterprise Linux 7 (RHEL7) getting the curator docker image fails:

Command:

docker run --rm untergeek/curator:8.0.3

output:

Unable to find image 'untergeek/curator:8.0.3' locally
Trying to pull repository untergeek/curator ... 
/usr/bin/docker-current: missing signature key.

Running the same on i.e. Ubuntu 22.04 LTS works as expected, so I expect that it is an issue with the version of RHEL7 docker.

Steps to Reproduce the Problem

1. Configure docker on RHEL7
2. Try and start undergeek/docker

Specifications

• Operating system: Red Hat Enterprise Linux Server release 7.9 (Maipo)

Docker version, is the bundled docker version for RHEL7

Client:
 Version:         1.13.1
 API version:     1.26
 Package version: docker-1.13.1-209.git7d71120.el7_9.x86_64
 Go version:      go1.10.3
 Git commit:      7d71120/1.13.1
 Built:           Fri Jan  7 13:15:46 2022
 OS/Arch:         linux/amd64

Server:
 Version:         1.13.1
 API version:     1.26 (minimum version 1.12)
 Package version: docker-1.13.1-209.git7d71120.el7_9.x86_64
 Go version:      go1.10.3
 Git commit:      7d71120/1.13.1
 Built:           Fri Jan  7 13:15:46 2022
 OS/Arch:         linux/amd64
 Experimental:    false

Context (Environment)

One of our elasticsearch / kibana / logstash (ELK) platforms runs on RHEL7, and we use (used) curator to manage indices.
Since the upgrade to ELK-8 curator has not worked with the old version of curator.

Detailed Description

It would be great if the docker build could support all major versions of the underlying docker client / server versions.