docs(example): add API ref link, update readme

thi-ng · Jul 15, 2018 · c95a370 · c95a370
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diff --git a/examples/crypto-chart/README.md b/examples/crypto-chart/README.md
@@ -2,6 +2,8 @@
 
 [Live demo](http://demo.thi.ng/umbrella/crypto-chart/)
 
+![chart](../../assets/crypto-chart.png)
+
 This example demonstrates how to use
 [@thi.ng/rstream](https://github.com/thi-ng/umbrella/tree/master/packages/rstream)
 &

diff --git a/examples/crypto-chart/src/index.ts b/examples/crypto-chart/src/index.ts
@@ -76,6 +76,7 @@ const TIME_TICKS = {
 };
 
 // constructs request URL from given inputs
+// API docs: https://min-api.cryptocompare.com/
 const API_URL = (market, symbol, period) =>
     `https://min-api.cryptocompare.com/data/histo${TIMEFRAMES[period].toLowerCase()}?fsym=${symbol.substr(0, 3)}&tsym=${symbol.substr(3)}&limit=168&aggregate=1&e=${market}`;