Bring builds back

[trickypr]

• I have read the Contributing Guidelines for this project.
• I have searched the issue tracker for an issue that matches the one I want to file, without success.

Component
Builds

Describe the bug
With all of the current interest in the browser, I believe that it would be to our interest to have builds outputing nightly builds explicitly flagged as alpha for people to try out.

To Reproduce
Steps to reproduce the behavior:

1. Go to the build pipeline
2. See builds being disabled

Expected behavior
Once the UI is in a state where it could be used for basic web browsing (e.g. opening and closing tabs, etc), the builds should be re enabled for people who wish to test them

Screenshots

System Information (please complete the following information):

• OS: N/A
• Version: N/A

Dot Browser Information (please complete the following information):

• Version: Nightly

Additional context
This would stop bug reports for issues related to #92 (that isn't the original, but oh well). It would give users a better idea of the progress we are making and allow them to file bug reports.