feat: RFCP MVP deployed on VPS

Iteration 1:
- Dark theme with 3-way toggle
- Dynamic heatmap gradient (blue→red)
- Radius up to 100km
- Save & Calculate workflow

Iteration 2:
- Terrain overlay toggle
- Batch height operations
- Zoom-dependent heatmap rendering

Infrastructure:
- Backend FastAPI on 8888
- Frontend static build via Caddy
- Systemd services
- Caddy reverse proxy integration

setup.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+# /opt/rfcp/setup.sh
+
+set -e
+
+echo "🚀 RFCP Backend Setup"
+
+# 1. Install system deps
+echo "📦 Installing system packages..."
+apt install -y python3.12-venv python3-pip
+
+# 2. Backend setup
+echo "🐍 Setting up Python backend..."
+cd /opt/rfcp
+mkdir -p backend/{app,tests}
+mkdir -p data/terrain
+
+# Create __init__.py
+touch backend/app/__init__.py
+
+# Create venv
+cd backend
+python3 -m venv venv
+source venv/bin/activate
+
+# Install deps
+pip install fastapi uvicorn python-multipart aiofiles
+
+# Create main.py (вже є в прикладі вище)
+
+# 3. Frontend setup
+echo "📱 Setting up frontend..."
+cd /opt/rfcp/frontend
+npm install
+
+# 4. Build frontend for production
+echo "🔨 Building frontend..."
+npm run build
+
+# 5. DNS setup
+echo "🌐 Configuring DNS..."
+if ! grep -q "rfcp.eliah.one" /etc/dnsmasq.d/matrix.conf; then
+    echo "address=/rfcp.eliah.one/10.10.10.1" >> /etc/dnsmasq.d/matrix.conf
+    systemctl restart dnsmasq
+fi
+
+# 6. Caddy config
+echo "🔧 Configuring Caddy..."
+if ! grep -q "rfcp.eliah.one" /etc/caddy/Caddyfile; then
+    cat >> /etc/caddy/Caddyfile << 'CADDY_EOF'
+
+rfcp.eliah.one {
+    reverse_proxy localhost:3000
+    reverse_proxy /api/* localhost:8090
+}
+CADDY_EOF
+    systemctl reload caddy
+fi
+
+echo "✅ Setup complete!"
+echo ""
+echo "Next steps:"
+echo "1. cd /opt/rfcp/backend && source venv/bin/activate"
+echo "2. uvicorn app.main:app --host 0.0.0.0 --port 8090"
+echo ""
+echo "Or use Docker:"
+echo "cd /opt/rfcp && docker compose up -d"