API interface for ES data

[erickmoura]

We are currently able to track the data we collect from Kibana.
However, our front-end application(s) will need to have access to that data as well.

Please, code a proxy API endpoint that our front-end apps will access in order to query the ES indexes.
Our ES indexes are publicly open for now, for simplicity. When we go to production, we will restrain ES access to our back-end IP, so the endpoint you'll code will be the access point for our app.