docs: update readme for usage

README.md

@@ -1,5 +1,7 @@
 # staker
-Pactus bond tools for multiple stake by config
+Pactus bond tools for multiple stake by config, you can stake many validators in same time with specific configuration.
+
+- Note: this approach is one to many (1 account address and many validators address)
 
 ## how to run?
 
@@ -20,6 +22,12 @@ Pactus bond tools for multiple stake by config
 }
 ```
 
+- `pactus_wallet_exec_path` is patus-wallet file address
+- `wallet_path` is address wallet file for example default path is `/home/{user}/pactus/wallets/default_wallet`
+- `amount` a certain amount that is shared between the validators
+- `wallet_address` sender address wallet have coin
+- `validators` is list of validators for stake **note: if your address is first time for validator need set public key in `pub`**
+
 2. run tools with `./staker -config ./cfg.json -password foobar`
 - `-config` config file path default is `./cfg.json`
 - `-password` is optional for wallet password