docs: document Reth port and log level variables in env files

Author: erhnysr

.env.mainnet

@@ -120,3 +120,21 @@ STATSD_ADDRESS="172.17.0.1"
 # NOTE: The node type that was chosen when first running a node cannot be changed after the initial sync. Turning Archive into Pruned, or Pruned into Full is not supported [source](https://reth.rs/run/faq/pruning/).
 # NOTE: The pruned snapshots provided are set with a distance of 1_339_200 (~31 days).
 # RETH_PRUNING_ARGS="--prune.senderrecovery.distance=50000 --prune.transactionlookup.distance=50000 --prune.receipts.distance=50000 --prune.accounthistory.distance=50000 --prune.storagehistory.distance=50000 --prune.bodies.distance=50000"
+
+# RETH PORT CONFIGURATION (OPTIONAL - OVERRIDE TO CHANGE DEFAULTS)
+# ---------------------------------------------------------------
+# These variables override the default ports used by the Reth execution client.
+# Only set these if you need to run multiple nodes or have port conflicts.
+# RPC_PORT=8545          # HTTP JSON-RPC port (default: 8545)
+# WS_PORT=8546           # WebSocket JSON-RPC port (default: 8546)
+# AUTHRPC_PORT=8551      # Authenticated RPC port for engine API (default: 8551)
+# METRICS_PORT=6060      # Prometheus metrics port (default: 6060)
+# DISCOVERY_PORT=30303   # P2P discovery port (default: 30303)
+# V5_DISCOVERY_PORT=9200 # discv5 discovery port (default: 9200)
+# P2P_PORT=30303         # P2P TCP port (default: 30303)
+
+# RETH LOG LEVEL (OPTIONAL - OVERRIDE TO CHANGE DEFAULT)
+# ------------------------------------------------------
+# Controls Reth execution client log verbosity.
+# Supported values: error, warn, info, debug, trace (default: info)
+# LOG_LEVEL=info

.env.sepolia

@@ -120,3 +120,21 @@ STATSD_ADDRESS="172.17.0.1"
 # NOTE: The node type that was chosen when first running a node cannot be changed after the initial sync. Turning Archive into Pruned, or Pruned into Full is not supported [source](https://reth.rs/run/faq/pruning/).
 # NOTE: The pruned snapshots provided are set with a distance of 1_339_200 (~31 days).
 # RETH_PRUNING_ARGS="--prune.senderrecovery.distance=50000 --prune.transactionlookup.distance=50000 --prune.receipts.distance=50000 --prune.accounthistory.distance=50000 --prune.storagehistory.distance=50000 --prune.bodies.distance=50000"
+
+# RETH PORT CONFIGURATION (OPTIONAL - OVERRIDE TO CHANGE DEFAULTS)
+# ---------------------------------------------------------------
+# These variables override the default ports used by the Reth execution client.
+# Only set these if you need to run multiple nodes or have port conflicts.
+# RPC_PORT=8545          # HTTP JSON-RPC port (default: 8545)
+# WS_PORT=8546           # WebSocket JSON-RPC port (default: 8546)
+# AUTHRPC_PORT=8551      # Authenticated RPC port for engine API (default: 8551)
+# METRICS_PORT=6060      # Prometheus metrics port (default: 6060)
+# DISCOVERY_PORT=30303   # P2P discovery port (default: 30303)
+# V5_DISCOVERY_PORT=9200 # discv5 discovery port (default: 9200)
+# P2P_PORT=30303         # P2P TCP port (default: 30303)
+
+# RETH LOG LEVEL (OPTIONAL - OVERRIDE TO CHANGE DEFAULT)
+# ------------------------------------------------------
+# Controls Reth execution client log verbosity.
+# Supported values: error, warn, info, debug, trace (default: info)
+# LOG_LEVEL=info