Clarify internal ports and add IP_CHECK_INTERVAL (Layr-Labs#12)

.env

@@ -12,14 +12,18 @@ NODE_CACHE_ENCODED_BLOBS=true
 NODE_NUM_WORKERS=1
 NODE_SRS_ORDER=524288
 NODE_DISPERSAL_PORT=32005
-NODE_INTERNAL_DISPERSAL_PORT=${NODE_DISPERSAL_PORT}
 NODE_QUORUM_ID_LIST=0
 NODE_VERBOSE=true
 NODE_RETRIEVAL_PORT=32004
-NODE_INTERNAL_RETRIEVAL_PORT=${NODE_RETRIEVAL_PORT}
 NODE_TIMEOUT=20s
 NODE_ENABLE_NODE_API=true
 
+# If you are using a reverse proxy in a shared network space, the reverse proxy should listen at $NODE_DISPERSAL_PORT
+# and forward the traffic to $NODE_INTERNAL_DISPERSAL_PORT, and similarly for retrieval. The DA node will register the 
+# $NODE_DISPERSAL_PORT port on the chain and listen for the reverse proxy at $NODE_INTERNAL_DISPERSAL_PORT.
+NODE_INTERNAL_DISPERSAL_PORT=${NODE_DISPERSAL_PORT}
+NODE_INTERNAL_RETRIEVAL_PORT=${NODE_RETRIEVAL_PORT} 
+
 # EigenDA mounted locations
 NODE_ECDSA_KEY_FILE=/app/operator_keys/ecdsa_key.json
 NODE_BLS_KEY_FILE=/app/operator_keys/bls_key.json
@@ -48,6 +52,9 @@ NODE_CHURNER_URL=churner-goerli.eigenda.xyz:443
 # If set to empty string, the IP address will be taken from the connection.
 # The rightmost value of the header will be used.
 NODE_CLIENT_IP_HEADER=x-real-ip
+# How often to check the public IP address of the node. Set this to 0 to disable
+# automatic IP address updating (if you have a stable IP address)
+PUBLIC_IP_CHECK_INTERVAL=10s 
 
 # goerli testnet disperser ip
 NAT_GATEWAY_IP=3.221.120.68