Docker Image

Hi,

Would it be possible to bundle this whole tool into a Docker Image?
I'm currently having some issues getting it to run properly within a GitLab CI context, being able to run it as an image without having the script call docker itself would be really convenient and simplify the usage of the tool.

Also, the image the `create.sh` script references is quite outdated `2.1.4` the newest version is `2.1.7`. Maybe if this was bundled into a docker image, one could have an automated build that builds a new version of this tool mirroring new Kong versions?

In addition, the script references the OSS image of Kong, I presume this won't create any issues with the enterprise version with uses the `kong/kong-gateway` image?

Start by inspecting create.sh and the Docker image references it uses. Define the requested image behavior, including running the tool without invoking Docker, version updates or automated builds, and compatibility with Kong OSS and kong/kong-gateway; done means these requirements are documented and verified.

Written by the indexing model from the issue text.