XML Validation entry point fails with pull from dockerhub

[josephsnyder]

Bug report

Expected Behavior

Using the validate-xml command, I would expect to pull the "latest" tag and and the validation to occur without issue.,

Actual Behavior

No validation is performed without an APP_KEY value

softhat@irune-vm-cdash2:~/Work/LANL/CDash$ sudo docker run -v ~/Work/LANL/cdash-examples/5-instrumentation/bin/Testing/20260804-1320:/tmp/validate kitware/cdash validate-xml
Error: APP_KEY environment variable is not set.  You can use the following randomly generated key:
dDh8U0SXESv5HFrQyXBJ9JSfkLTW2mI1

CDash Version

"Id": "sha256:22057d6ade54b96ce15237c1d8b71af8fbeac9272bcd7b1d36c5b9619f5755a3",
        "RepoTags": [
            "kitware/cdash:latest"
        ],
        "RepoDigests": [
            "kitware/cdash@sha256:0d8cb88559bb95f2c85e5915228248ffcdddabe9fc976d01bd9258b7ea713d55"
        ],
        "Parent": "",
        "Comment": "buildkit.dockerfile.v0",
        "Created": "2026-07-16T21:31:18.685923101Z",
        "DockerVersion": "",
        "Author": "",
        "Config": {
            "Hostname": "",

Additional Information