At the moment if you want to fix a Nextflow version, you have to use a pre-run script to export the environment version. This is fine, but it's not intuitive for what is a fairly central part of the experience of running Nextflow on Seqera Platform.

Suggestion is to have a new field in the UI to set the Nextflow version. This could potentially be when creating a new Compute Environment, ideally with a secondary field which could be set when launching a workflow (either to set new or to override the default in the CE).

The field should default to using the latest stable release of Nextflow, but give the option of using the latest edge release instead, or a specified exact release version.