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/deploy-second-node.sh

@@ -0,0 +1,127 @@
+#!/bin/bash
+
+# Deploy a second blockchain node on the same server
+
+set -e
+
+echo "🚀 Deploying Second Blockchain Node"
+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"
+}
+
+# Create directory for second node
+print_status "Creating directory for second node..."
+NODE2_DIR="/opt/blockchain-node-2"
+sudo mkdir -p $NODE2_DIR
+sudo chown $USER:$USER $NODE2_DIR
+
+# Copy blockchain node code
+print_status "Copying blockchain node code..."
+cp -r /opt/blockchain-node/* $NODE2_DIR/
+
+# Create configuration for second node
+print_status "Creating configuration for second node..."
+cat > $NODE2_DIR/.env << EOF
+CHAIN_ID=ait-devnet
+DB_PATH=./data/chain2.db
+RPC_BIND_HOST=127.0.0.1
+RPC_BIND_PORT=8081
+P2P_BIND_HOST=0.0.0.0
+P2P_BIND_PORT=7071
+PROPOSER_KEY=node2_proposer_key_$(date +%s)
+MINT_PER_UNIT=1000
+COORDINATOR_RATIO=0.05
+GOSSIP_BACKEND=http
+GOSSIP_BROADCAST_URL=http://127.0.0.1:7070/gossip
+EOF
+
+# Create data directory
+mkdir -p $NODE2_DIR/data/devnet
+
+# Generate genesis file (same as first node)
+print_status "Generating genesis file..."
+cd $NODE2_DIR
+export PYTHONPATH="${NODE2_DIR}/src:${NODE2_DIR}/scripts:${PYTHONPATH:-}"
+python3 scripts/make_genesis.py --output data/devnet/genesis.json --force
+
+# Create systemd service
+print_status "Creating systemd service..."
+sudo cat > /etc/systemd/system/blockchain-node-2.service << EOF
+[Unit]
+Description=AITBC Blockchain Node 2
+After=network.target
+
+[Service]
+Type=exec
+User=root
+WorkingDirectory=$NODE2_DIR
+Environment=PATH=$NODE2_DIR/.venv/bin:/usr/local/bin:/usr/bin:/bin
+Environment=PYTHONPATH=$NODE2_DIR/src:$NODE2_DIR/scripts
+ExecStart=$NODE2_DIR/.venv/bin/python3 -m aitbc_chain.main
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+# Create RPC API service
+print_status "Creating RPC API service..."
+sudo cat > /etc/systemd/system/blockchain-rpc-2.service << EOF
+[Unit]
+Description=AITBC Blockchain RPC API 2
+After=blockchain-node-2.service
+
+[Service]
+Type=exec
+User=root
+WorkingDirectory=$NODE2_DIR
+Environment=PATH=$NODE2_DIR/.venv/bin:/usr/local/bin:/usr/bin:/bin
+Environment=PYTHONPATH=$NODE2_DIR/src:$NODE2_DIR/scripts
+ExecStart=$NODE2_DIR/.venv/bin/python3 -m uvicorn aitbc_chain.app:app --host 0.0.0.0 --port 8081
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+# Setup Python environment
+print_status "Setting up Python environment..."
+cd $NODE2_DIR
+python3 -m venv .venv
+source .venv/bin/activate
+pip install --upgrade pip
+pip install -e .
+
+# Enable and start services
+print_status "Enabling and starting services..."
+sudo systemctl daemon-reload
+sudo systemctl enable blockchain-node-2 blockchain-rpc-2
+sudo systemctl start blockchain-node-2 blockchain-rpc-2
+
+# Check status
+print_status "Checking service status..."
+sudo systemctl status blockchain-node-2 --no-pager -l
+sudo systemctl status blockchain-rpc-2 --no-pager -l
+
+echo ""
+print_status "✅ Second blockchain node deployed!"
+echo ""
+echo "Node 1 RPC: http://127.0.0.1:8080"
+echo "Node 2 RPC: http://127.0.0.1:8081"
+echo ""
+echo "To check logs:"
+echo "  Node 1: sudo journalctl -u blockchain-node -f"
+echo "  Node 2: sudo journalctl -u blockchain-node-2 -f"