Merge pull request #94 from Relayz-io/silvestr/add-node-info-struct

Add ```NodeInfo``` struct for node provision

common-api/src/api.rs

     pub public_key: Ed25519PublicKey,
     pub account_id: AccountId,
 }
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct NodeInfo {
+    pub region: String,
+    pub bandwidth: String,
+    pub account_id: AccountId,
+}