Template wizard launcher uses github CDN, which does not update immediately after push

[nkrumm]

In GitLab by @nkrumm on Dec 30, 2019, 11:52

When launching a workflow via the template wizard launcher, the nextflow.config file is retrieved via the raw.githubusercontent.com cdn-- and this does not always immediately update on push. Therefore, users could be seeing a stale copy of the nextflow config file during the launch process, causing confusion or errors.

Options:

1. Use a faster CDN -- https://combinatronics.com/ might be an option (github only)
2. Use a git client in the wizard backend to fetch the latest copy of a file (this would also be needed for private repos)
3. use a github API?