feat(docker): add containerization for production deployment

- Added Dockerfile with multi-stage build (Go 1.25rc1-alpine)
- Added docker-compose.yml for easy deployment
- Added .dockerignore for efficient builds
- Bot now runs in Podman/Docker container as intended

🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,28 @@
+version: '3.8'
+
+services:
+  mev-bot:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: mev-flashloan:latest
+    container_name: mev-flashloan-bot
+    restart: unless-stopped
+    environment:
+      - ARBITRUM_RPC_URL=${ARBITRUM_RPC_URL:-https://arb1.arbitrum.io/rpc}
+      - PRIVATE_KEY=${PRIVATE_KEY}
+      - MIN_PROFIT_BPS=${MIN_PROFIT_BPS:-10}
+      - SCAN_INTERVAL=${SCAN_INTERVAL:-30s}
+      - MAX_GAS_PRICE=${MAX_GAS_PRICE:-1000000000}
+    command: ["--min-profit", "${MIN_PROFIT_BPS:-10}", "--interval", "${SCAN_INTERVAL:-30s}"]
+    networks:
+      - mev-network
+    logging:
+      driver: "json-file"
+      options:
+        max-size: "10m"
+        max-file: "3"
+
+networks:
+  mev-network:
+    driver: bridge