Dynamic tracing system that tends to be real-time.
Node.js bindings.
Add it as a dependency to your `node.js` project:
```sh
npm install --save @rillrate/rillrate
```
Import it in your code and install a tracer:
```js
rillrate = require('@rillrate/rillrate');
rillrate.install();
```
Add a metric and use methods to update it:
```js
gauge = new rillrate.Gauge("my.gauge");
gauge.set(123.0);
```