feat: Add CI

.woodpecker.yml

@@ -0,0 +1,7 @@
+steps:
+  build: golang/1.21.5-alpine
+  commands:
+    - go get
+    - go build ./cmd/rio
+    - go fmt $(go list ./... | grep -v /vendor/)
+    - go vet $(go list ./... | grep -v /vendor/)