fix(proxy): change to point to live site
fix(interview-upload): fix uploaded audio files not setting HAS_FILE

When audio files are being uploaded, the HAS_FILE property wasn't being set (well, it was trying to push into an array that doesn't exist). All newly created interviews should work fine, but older interviews there might be a problem, as the audio files will  be missing - that HAS_FILE relationship was never recorded.
Merge pull request #115 from uq-eresearch/fix-peter-heathwood-interview-audio

Fix peter heathwood interview audio