Use `main` as default branch instead of `develop`

[micahflee]

Proposal:

Affected components

• SecureDrop Server

People and roles

Problem Statement

The default branch of the securedrop repo is called develop, and it has been like this something like a decade.

In that time, git has collectively standardized from using a default branch called master to a default branch called main, and it seems like all of FPF's other repos are using main as the default branch too. As far as I know, the reason the securedrop repo uses develop is purely historical, and there isn't any other reason for it.

I think it would be slightly cleaner and more consistent if we change it to main.

Solution impact

This should only impact SecureDrop developers who have already cloned the repo, and it should be really easy for us to fix our local environments. We might need to update the developer docs too.

Requirements and constraints

Exploration

Initial proposal

Use main as the default branch instead of develop.

Selected proposal

[legoktm]

Only thumbs up from the team after asking asynchronously, I'll double check with folks in January and then we can consider this agreed upon and figure out the implementation + coordination.

[legoktm]

I believe we have enough agreement on renaming the branch, I'll follow-up with infra to figure out when is a good time to do this and how complex it'll be with the various integrations on their side (demo, etc.).