Autodeployment server not remembering previous build info

[humphd]

In https://github.com/Seneca-CDOT/telescope/blob/master/tools/autodeployment/builds.js#L79-L80 and https://github.com/Seneca-CDOT/telescope/blob/master/tools/autodeployment/builds.js#L68-L71 we have a bug where we don't set the builds.previous to be the current build when changing to a new build, thus losing track of that info.

If you go to our autodeployment server's /status endpoint, you'll see that previous is always null:

• staging https://dev.telescope.cdot.systems:4000/status
• prod https://telescope.cdot.systems:4000/status

We should take whatever is current and move it to previous so we don't lose it.

[dhillonks]

@humphd Can I work on this?

[humphd]

@dhillonks absolutely