Integrate with cloud (#1200)

* update default url for services

* fix npe

* spotlesS

* revert gradle properties

Author: josh-richardson

Diff for: core/src/main/java/org/web3j/account/LocalWeb3jAccount.java

@@ -28,7 +28,9 @@ public class LocalWeb3jAccount {
     private static final Path EPIRUS_CONFIG_PATh =
             Paths.get(System.getProperty("user.home"), ".epirus", ".config");
 
-    private static String NODE_RPC_ENDPOINT = "https://%s-eth.epirus.io/%s";
+    public static final String DEFAULT_APP_URL =
+            System.getenv().getOrDefault("EPIRUS_APP_URL", "https://app.epirus.io");
+    private static final String NODE_RPC_ENDPOINT = DEFAULT_APP_URL + "/api/rpc/%s/%s/";
 
     public static HttpService getOnlineServicesHttpService(final Network network) throws Exception {
         if (configExists()) {