chore: update README.md for node-funder

README.md

@@ -302,6 +302,28 @@ example:
 beekeeper version
 ```
 
+## node-funder
+
+Command **node-funder** uses https://github.com/ethersphere/node-funder tool to fund (top up) bee nodes up to the specified amount. It can fund all nodes in k8s namespace or it can fund only specified addresses.
+
+It has following flags:
+```
+--addresses strings            Comma-separated list of Bee node addresses (must start with 0x). Overrides namespace and cluster name.
+--chain-node-endpoint string   Endpoint to chain node. Required.
+--cluster-name string          Cluster name. Ignored if addresses or namespace are set.
+--help                         help for node-funder
+--min-native float             Minimum amount of chain native coins (xDAI) nodes should have.
+--min-swarm float              Minimum amount of swarm tokens (xBZZ) nodes should have.
+--namespace string             Kubernetes namespace. Overrides cluster name if set.
+--timeout duration             Timeout. (default 5m0s)
+--wallet-key string            Hex-encoded private key for the Bee node wallet. Required.
+```
+
+example:
+```
+beekeeper node-funder --chain-node-endpoint="http://geth-swap.default.testnet.internal" --wallet-key="4663c222787e30c1994b59044aa5045377a6e79193a8ead88293926b535c722d" --namespace=default --min-swarm=180 --min-native=2.2 --log-verbosity=3
+```
+
 # Global flags
 
 Global flags can be used with any command.