docs: report card

Signed-off-by: Matt Gleich <[email protected]>

README.md

@@ -3,5 +3,6 @@
 [![build](https://github.com/gleich/lcp-2/actions/workflows/build.yml/badge.svg)](https://github.com/gleich/lcp-2/actions/workflows/build.yml)
 [![deploy](https://github.com/gleich/lcp-2/actions/workflows/deploy.yml/badge.svg)](https://github.com/gleich/lcp-2/actions/workflows/deploy.yml)
 [![lint](https://github.com/gleich/lcp-2/actions/workflows/lint.yml/badge.svg)](https://github.com/gleich/lcp-2/actions/workflows/lint.yml)
+[![report card](https://goreportcard.com/badge/pkg.mattglei.ch/lcp-2)](https://goreportcard.com/report/pkg.mattglei.ch/lcp-2)
 
 Lightweight Cache Proxy Service. Powers [mattglei.ch](https://mattglei.ch). Checkout V1 written in rust: [gleich/lcp](https://github.com/gleich/lcp)