Add example environment files for new node setup

examples/node.env.example

@@ -0,0 +1,50 @@
+# AITBC Node-Specific Environment Configuration Template
+# Copy this file to /etc/aitbc/node.env and customize for each node
+# This file contains variables unique to each node - DO NOT share across nodes
+
+# =========================
+# Node Identity
+# =========================
+# Unique identifier for this node (must be different for each node)
+NODE_ID=aitbc
+
+# =========================
+# P2P Configuration
+# =========================
+# P2P node identity (must be unique for each node)
+p2p_node_id=aitbc
+
+# Proposer ID (PoA authority/block proposer)
+# Each node should have its own unique proposer_id
+proposer_id=ait1ytkh0cn8v2a4zjwzyav6854832myf9j7unsse8yntmuwzst4qhtqe9hqdw
+
+# P2P Peers (comma-separated list of peer nodes)
+# List other nodes in the network that this node should connect to
+# Format: hostname:port (e.g., "aitbc1:7070,aitbc2:7070")
+p2p_peers=aitbc1:7070
+
+# =========================
+# Trusted Propers
+# =========================
+# For follower nodes - list of trusted proposer addresses
+# Leave empty for proposer nodes
+trusted_proposers=
+
+# =========================
+# Node-Specific Host Bindings (optional)
+# =========================
+# Override default host bindings if needed for this specific node
+# NODE_HOST=0.0.0.0
+# NODE_PORT=7070
+
+# =========================
+# Setup Instructions
+# =========================
+# 1. Copy this template: cp /opt/aitbc/examples/node.env.example /etc/aitbc/node.env
+# 2. Edit /etc/aitbc/node.env and set unique values for:
+#    - NODE_ID (unique per node)
+#    - p2p_node_id (unique per node)
+#    - proposer_id (unique per node)
+#    - p2p_peers (list other nodes in network)
+# 3. Restart services: systemctl restart aitbc-blockchain-p2p
+# 4. Verify connectivity: journalctl -fu aitbc-blockchain-p2p