Very long messages don't generate reasonable output

[clockworksoul]

Long outputs (such as the help message from kubectl) don't generated reasonable output.

• Slack: A invalid_blocks appears, followed by the text in plain (not monospace) format
• Discord: An Invalid Form Body error is output.

To replicate

Install and enable this bundle:

gort_bundle_version: 1
name: kubectl
version: 0.0.1
description: Kubectl
docker:
    image: clockworksoul/kubectl
    tag: latest
commands:
    kubectl:
        executable: [/usr/local/bin/kubectl]
        rules:
            - allow

Execute the following command in Slack or Discord: !kubectl --help