Reduce api response time

[amio]

Thanks for this awesome service!

We are planning to create a badge hosting for microbadger, while currently the api response is quite slow:

• https://api.microbadger.com/v1/images/node
• https://api.microbadger.com/v1/images/elasticsearch
• https://api.microbadger.com/v1/images/mhart/alpine-node

Is there any plan on optimizing this? I think a handy CDN cache would be a great help.

[lizrice]

Good idea, We'll take a look at using a CDN. @rossf7 let's discuss