chore: expose http rpc port

Author: danyalprout

examples/op-stack-rollup-boost.md

@@ -35,7 +35,7 @@ The `--external-builder` flag is used to specify the URL of the external block b
 Third, we can start the `op-reth` binary as the external block builder:
 
 ```bash
-$ $HOME/.playground/op-reth-v1.3.9 node --authrpc.port 4444 --authrpc.jwtsecret $HOME/.playground/devnet/jwtsecret --chain $HOME/.playground/devnet/l2-genesis.json --datadir /tmp/builder --disable-discovery --port 30333 --trusted-peers enode://3479db4d9217fb5d7a8ed4d61ac36e120b05d36c2eefb795dc42ff2e971f251a2315f5649ea1833271e020b9adc98d5db9973c7ed92d6b2f1f2223088c3d852f@127.0.0.1:30304
+$ $HOME/.playground/op-reth-v1.3.9 node --http --http.port 2222 --authrpc.port 4444 --authrpc.jwtsecret $HOME/.playground/devnet/jwtsecret --chain $HOME/.playground/devnet/l2-genesis.json --datadir /tmp/builder --disable-discovery --port 30333 --trusted-peers enode://3479db4d9217fb5d7a8ed4d61ac36e120b05d36c2eefb795dc42ff2e971f251a2315f5649ea1833271e020b9adc98d5db9973c7ed92d6b2f1f2223088c3d852f@127.0.0.1:30304
 ```
 
 The command above starts op-reth as an external block builder with the following key parameters: