fix: update machine references to node

[l00ps]

This PR fixes #128

[davidfreina]

I think you missed one replacement of 'machine'.
In the renderer.py on line 352 the machine page fail to load with a 502 if it enters this if-clause because the app.logger.debug statement still contains a reference to routes['machine'] which should be replaced with routes['node'].
I have opened a PR to your branch to fix this last reference (l00ps#2).

[ClashTheBunny]

Would a more robust way of doing this support both the old version and the new version?