Docs improvements

ADVANCED.md

@@ -24,6 +24,17 @@ const orion = new Orion({
   },
 });
 
+// Also you can set some config as default and override it for some params
+const orion = new Orion("testing", {
+  analyticsAPI: "https://asdasd.orionprotocol.io",
+  networks: {
+    [SupportedChainId.BSC_TESTNET]: {
+      nodeJsonRpc: "https://data-seed-prebsc-1-s1.binance.org:8545/",
+    },
+  },
+});
+
+// Orion unit init
 const orionUnit = orion.getUnit("bsc");
 // OR
 const orionUnit = orion.getUnit(SupportedChainId.BSC);