Question about KNIME and docker hub

Hi,

On the official KNIME docker hub page, it is written that

“the Docker image of the KNIME executor in the desired version needs to be referenced in order to create execution contexts⁠. Execution contexts provide dedicated execution resources with configured settings to run and deploy workflows on KNIME Business Hub.”

Does the use of the docker image require the execution context or is the latter only needed to interact with KNIME Business hub ? Does the use of the docker image require the interaction with KNIME Business hub or can it work or be adapted to work with other local contexts ?

Kind regards,

Geo