added daily builds at midnight

[michaelperel]

• Daily builds ensure that code on master will not go stale, even if no new changes were introduced
• Will ensure that contributors can know the status of tests on master, always
• Here is a link to the AZDO docs for schedules to read more

[michaelperel]

@evanlouie @timfpark I opened this PR because when I started contributing on the helm 3 PR, tests were failing on master despite the badge in the README showing they passed. It was difficult at first to contribute because I thought I had done something wrong when setting up the project.

In that PR, I fix the logic of the broken tests as part of the helm 3 upgrade.

In this PR, I suggest adding a nightly build so these problems can be caught/it becomes easier for people to contribute.

This means that this PR will fail, since master is failing. I figure this could be merged once the helm 3 PR is merged.

Thanks!

[evanlouie]

thanks for the PR! any reason you can think of we shouldn't merge now?

[michaelperel]

@evanlouie I think it should be merged, I just wasn't sure if it would be possible given that the build is failing. If you are able to, I am all for it!