Scrapes current price quotes from yahoo and exposes them for Prometheus
Reads comma-separated symbols from environment variable SYMBOLS
$ docker run -it -e SYMBOLS=BTC-EUR,BTC-USD -p 8080:8080 m2rtk/priceprom
$ curl localhost:8080
price_quote{symbol="BTC-EUR"} 47430.97
price_quote{symbol="BTC-USD"} 54878.79