feat: Add Dockerfile for UniFi MCP server

- Node 20 alpine base image
- Production-ready with health checks
- Non-root user for security

🤖 Generated with Claude Code

Author: ry-ops

Dockerfile

@@ -0,0 +1,33 @@
+# UniFi MCP Server Dockerfile
+FROM node:20-alpine
+
+LABEL org.opencontainers.image.title="UniFi MCP Server"
+LABEL org.opencontainers.image.description="MCP server for UniFi Network management"
+LABEL org.opencontainers.image.source="https://github.com/ry-ops/unifi-mcp-server"
+LABEL org.opencontainers.image.vendor="ry-ops"
+
+RUN apk add --no-cache ca-certificates curl
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm ci --only=production && npm cache clean --force
+
+COPY . .
+
+RUN addgroup -g 1001 -S unifi && \
+    adduser -S -u 1001 -G unifi unifi && \
+    chown -R unifi:unifi /app
+
+USER unifi
+
+ENV NODE_ENV=production
+ENV MCP_SERVER_TYPE=unifi
+
+EXPOSE 3000
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:3000/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1))" || exit 1
+
+CMD ["node", "index.js"]