Orion, Orion Unit, Configuration (#40)

* Refactoring

* Better docs

* Bump

* ESLint standard

* Fix

* Bumo

* VerboseOrionUnitConfig to types

* Docs improvements

* Docs improvements. Orion default env

src/services/PriceFeed/index.ts

@@ -9,6 +9,10 @@ class PriceFeed {
 
   readonly ws: PriceFeedWS;
 
+  get api() {
+    return this.apiUrl;
+  }
+
   constructor(apiUrl: string) {
     this.apiUrl = apiUrl;
     this.ws = new PriceFeedWS(this.wsUrl);