refactor: clean up configuration and add production infrastructure

- Add .aitbc.yaml configuration file with test values
- Simplify .gitignore by removing merge conflicts and redundant entries
- Reorganize .gitignore sections for better clarity
- Set chain_id and proposer_id to empty strings in config.py (require explicit configuration)
- Add production Helm values configuration
- Add production nginx configuration
- Update environment variable handling in chain settings

scripts/deploy/setup-gossip-relay.sh

@@ -0,0 +1,113 @@
+#!/bin/bash
+
+# Setup gossip relay to connect blockchain nodes
+
+set -e
+
+echo "🌐 Setting up Gossip Relay for Blockchain Nodes"
+echo "=============================================="
+
+# Colors
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+print_status() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+# Stop existing nodes
+print_status "Stopping blockchain nodes..."
+sudo systemctl stop blockchain-node blockchain-node-2 blockchain-rpc blockchain-rpc-2 2>/dev/null || true
+
+# Update node configurations to use broadcast backend
+print_status "Updating Node 1 configuration..."
+sudo cat > /opt/blockchain-node/.env << EOF
+CHAIN_ID=ait-devnet
+DB_PATH=./data/chain.db
+RPC_BIND_HOST=127.0.0.1
+RPC_BIND_PORT=8082
+P2P_BIND_HOST=0.0.0.0
+P2P_BIND_PORT=7070
+PROPOSER_KEY=node1_proposer_key_$(date +%s)
+MINT_PER_UNIT=1000
+COORDINATOR_RATIO=0.05
+GOSSIP_BACKEND=broadcast
+GOSSIP_BROADCAST_URL=http://127.0.0.1:7070/gossip
+EOF
+
+print_status "Updating Node 2 configuration..."
+sudo cat > /opt/blockchain-node-2/.env << EOF
+CHAIN_ID=ait-devnet
+DB_PATH=./data/chain2.db
+RPC_BIND_HOST=127.0.0.1
+RPC_BIND_PORT=8081
+P2P_BIND_HOST=0.0.0.0
+P2P_BIND_PORT=7071
+PROPOSER_KEY=node2_proposer_key_$(date +%s)
+MINT_PER_UNIT=1000
+COORDINATOR_RATIO=0.05
+GOSSIP_BACKEND=broadcast
+GOSSIP_BROADCAST_URL=http://127.0.0.1:7070/gossip
+EOF
+
+# Create gossip relay service
+print_status "Creating gossip relay service..."
+sudo cat > /etc/systemd/system/blockchain-gossip-relay.service << EOF
+[Unit]
+Description=AITBC Blockchain Gossip Relay
+After=network.target
+
+[Service]
+Type=exec
+User=root
+WorkingDirectory=/opt/blockchain-node
+Environment=PATH=/opt/blockchain-node/.venv/bin:/usr/local/bin:/usr/bin:/bin
+Environment=PYTHONPATH=/opt/blockchain-node/src:/opt/blockchain-node/scripts
+ExecStart=/opt/blockchain-node/.venv/bin/python3 -m aitbc_chain.gossip.relay --port 7070 --host 0.0.0.0
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+# Enable and start gossip relay
+print_status "Starting gossip relay..."
+sudo systemctl daemon-reload
+sudo systemctl enable blockchain-gossip-relay
+sudo systemctl start blockchain-gossip-relay
+
+# Wait for relay to start
+sleep 2
+
+# Check if relay is running
+print_status "Checking gossip relay status..."
+sudo systemctl status blockchain-gossip-relay --no-pager | head -10
+
+# Restart blockchain nodes
+print_status "Restarting blockchain nodes with shared gossip..."
+sudo systemctl start blockchain-node blockchain-node-2 blockchain-rpc blockchain-rpc-2
+
+# Wait for nodes to start
+sleep 3
+
+# Check status
+print_status "Checking node status..."
+sudo systemctl status blockchain-node blockchain-node-2 --no-pager | grep -E 'Active:|Main PID:'
+
+echo ""
+print_status "✅ Gossip relay setup complete!"
+echo ""
+echo "Nodes are now connected via shared gossip backend."
+echo "They should sync blocks and transactions."
+echo ""
+echo "To verify connectivity:"
+echo "  1. Run: python /opt/test_blockchain_simple.py"
+echo "  2. Check if heights are converging"
+echo ""
+echo "Gossip relay logs: sudo journalctl -u blockchain-gossip-relay -f"