Setup a Fastly service to serve audio

[sjparkinson]

Currently this app serves the audio content from S3 directly 😱.

audio-available/bin/lib/get-s3-public-url.js

Line 2 in fd180f0

return `https://s3-${process.env.AWS_REGION}.amazonaws.com/${process.env.AWS_AUDIO_BUCKET}/${uuid}.${process.env.SL_MEDIA_FORMAT}`;

This bucket is now the second most expensive in the company for S3 transfer costs, about $310 a month.

It'd be well worth setting up either CloudFront, or even better a Fastly service with segmented caching enabled to reduce the costs.