Update README.md

Author: tak1827

README.md

@@ -31,6 +31,14 @@ Address : 0xabcd1234...
 Key     : 0xabcd1234...
 ```
 
+Please fund at least 10 OAS to the following address. This address will send transactions to our L1 to cover the required gas fees:
+- OP_PROPOSER_ADDR
+- OP_BATCHER_ADDR
+- MR_PROVER_ADDR
+- MR_FINALIZER_ADDR
+- VERIFY_SUBMITTER_ADDR
+
+
 ## Create `jwt.txt`
 Create the JWT secret used for authentication between `op-node` and `op-geth`. This secret does not need to be backed up.
 ```shell