docs: add note about capella at 0 for MEV (#266)

Co-authored-by: Derek <103802618+leeederek@users.noreply.github.com>

README.md

@@ -457,6 +457,16 @@ This package also supports a `"mev_type": "mock"` mode that will only bring up:
 
 For more details, including a guide and architecture of the `mev-boost` infrastructure, go [here](https://docs.kurtosis.com/how-to-full-mev-with-eth2-package).
 
+## MEV-Boost usage with Capella at Epoch 0
+
+This note is from 2023-10-05
+
+`flashbots/mev-boost-relay:0.27` and later support `capella_fork_epoch` at `0` but this seems to require a few flags enabled
+on the `lighthouse` beacon client including `--always-prefer-builder-payload` and `--disable-peer-scoring`
+
+Users are recommended to use [`examples/capella-mev.json`](./examples/capella-mev.json); as inspiration for reliable payload
+delivery.
+
 ## Pre-funded accounts at Genesis
 
 This package comes with [seven prefunded keys for testing](https://github.com/kurtosis-tech/ethereum-package/blob/main/src/prelaunch_data_generator/genesis_constants/genesis_constants.star).

examples/capella-mev.json

@@ -0,0 +1,28 @@
+{
+	"mev_type": "full",
+    "participants": [{
+        "el_client_type": "geth",
+        "el_client_image": "ethereum/client-go:latest",
+        "el_client_log_level": "",
+        "cl_client_type": "lighthouse",
+        "cl_client_log_level": "",
+        "cl_client_image": "sigp/lighthouse",
+        "el_extra_params": [
+        ],
+        "beacon_extra_params": [
+            "--always-prefer-builder-payload",
+            "--disable-peer-scoring"
+        ]
+    }],
+	"network_params": {
+		"capella_fork_epoch": 0,
+		"seconds_per_slot": 12
+	},
+	"mev_params": {
+        "mev_flood_seconds_per_bundle": 12,
+        "launch_custom_flood": false,
+        "mev_flood_extra_args": [ "--txsPerBundle=300" ],
+        "mev_flood_image": "flashbots/mev-flood:0.0.9",
+        "mev_relay_image": "flashbots/mev-boost-relay:0.27.0"
+    }
+}