feat: add build info endpoint

cmd/ev/app.info.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"runtime/debug"
+
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/service"
+)
+
+var _ = apps.Register(50, func(ctx context.Context, svc *service.Harness) error {
+	_, span := lg.Span(ctx)
+	defer span.End()
+
+	svc.Add(&info{})
+
+	return nil
+})
+
+type info struct{}
+
+func (info) RegisterHTTP(mux *http.ServeMux) {
+	mux.HandleFunc("/info", func(w http.ResponseWriter, r *http.Request) {
+		bi, ok := debug.ReadBuildInfo()
+		if !ok {
+			fmt.Fprint(w, "Build Info not avalible.")
+			return
+		}
+		fmt.Fprint(w, bi)
+	})
+}